{"id":6200,"date":"2025-09-23T04:32:33","date_gmt":"2025-09-23T04:32:33","guid":{"rendered":"https:\/\/elevemotors.com\/product\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\/"},"modified":"2025-11-17T14:44:38","modified_gmt":"2025-11-17T14:44:38","slug":"edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp","status":"publish","type":"product","link":"https:\/\/elevemotors.com\/it\/prodotto\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\/","title":{"rendered":"Edelbrock 49557 Edelbrock\/Musi 555 RPM XT EFI 723 HP"},"content":{"rendered":"<h1 data-start=\"0\" data-end=\"92\"><strong data-start=\"4\" data-end=\"90\">  Edelbrock\/Musi 555 Pro-Flo 4 XT EFI Crate Engine \u2013 723 HP Big Block Powerhouse!<\/strong><\/h1>\n<h2 data-start=\"94\" data-end=\"437\">  <strong data-start=\"97\" data-end=\"176\">Unleash 723 HP &amp; 652 LB-FT Torque with the Edelbrock\/Musi 555 Crate Engine!<\/strong><\/h2>\n<ul class=\"description_pdp_summary_bullets__v8kn5\">\n<li class=\"p p-color-none p-font-regular p-0_875 description_pdp_summary_bullet__9I4Fm\">Block has a 9.8&#8243; deck height and a 10.0:1 compression ratio<\/li>\n<li class=\"p p-color-none p-font-regular p-0_875 description_pdp_summary_bullet__9I4Fm\">This 555 c.i. engine puts out an astonishing 723 horsepower and 652 ft. lb. of torque<\/li>\n<li class=\"p p-color-none p-font-regular p-0_875 description_pdp_summary_bullet__9I4Fm\">System also includes fuel injectors, fuel rails, fuel pump, throttle body, electronic engine control unit (ECU) and 7&#8243; Android tablet with pre-loaded E-Tuner app and calibrations<\/li>\n<li class=\"p p-color-none p-font-regular p-0_875 description_pdp_summary_bullet__9I4Fm\">Includes a front mount 90mm throttle body design manifold with a large plenum and tapered runners that deliver more horsepower and torque than a traditional single-plane intake manifold<\/li>\n<li class=\"p p-color-none p-font-regular p-0_875 description_pdp_summary_bullet__9I4Fm\">The E-Tuner app uses a Bluetooth wireless connection to communicate with the ECU\u2019s self-learning capability to continually adjust the calibration to get the maximum performance of your engine<\/li>\n<\/ul>\n<h2 data-start=\"1723\" data-end=\"1785\"><strong data-start=\"1726\" data-end=\"1783\">  What\u2019s Included in the Edelbrock 555 Crate Engine?<\/strong><\/h2>\n<p data-start=\"1787\" data-end=\"2845\">\u2705 <strong data-start=\"1789\" data-end=\"1819\">9.8&#8243; Deck Height Big Block<\/strong> \u2013 <strong data-start=\"1822\" data-end=\"1865\">Rugged &amp; durable cast-iron construction<\/strong><br data-start=\"1865\" data-end=\"1868\" \/>\u2705 <strong data-start=\"1870\" data-end=\"1904\">Forged Steel 4.250\u201d Crankshaft<\/strong> \u2013 <strong data-start=\"1907\" data-end=\"1966\">Maximum strength &amp; reliability under extreme conditions<\/strong><br data-start=\"1966\" data-end=\"1969\" \/>\u2705 <strong data-start=\"1971\" data-end=\"2010\">Forged Pistons for High Performance<\/strong> \u2013 <strong data-start=\"2013\" data-end=\"2062\">Superior durability &amp; compression consistency<\/strong><br data-start=\"2062\" data-end=\"2065\" \/>\u2705 <strong data-start=\"2067\" data-end=\"2110\">Edelbrock E-CNC Aluminum Cylinder Heads<\/strong> \u2013 <strong data-start=\"2113\" data-end=\"2162\">Precision-machined for increased power output<\/strong><br data-start=\"2162\" data-end=\"2165\" \/>\u2705 <strong data-start=\"2167\" data-end=\"2220\">Rollin\u2019 Thunder Hydraulic Roller Camshaft (#2264)<\/strong> \u2013 <strong data-start=\"2223\" data-end=\"2269\">Perfect balance of torque &amp; high-RPM power<\/strong><br data-start=\"2269\" data-end=\"2272\" \/>\u2705 <strong data-start=\"2274\" data-end=\"2296\">90mm Throttle Body<\/strong> \u2013 <strong data-start=\"2299\" data-end=\"2361\">Large front-mount design for improved airflow &amp; efficiency<\/strong><br data-start=\"2361\" data-end=\"2364\" \/>\u2705 <strong data-start=\"2366\" data-end=\"2413\">Pro-Flo 4 XT Multi-Port EFI System (#35883)<\/strong> \u2013 <strong data-start=\"2416\" data-end=\"2476\">Delivers race-level fuel atomization &amp; throttle response<\/strong><br data-start=\"2476\" data-end=\"2479\" \/>\u2705 <strong data-start=\"2481\" data-end=\"2527\">E-Tuner Bluetooth App for Live Calibration<\/strong> \u2013 <strong data-start=\"2530\" data-end=\"2583\">Wireless ECU adjustments for ultimate performance<\/strong><br data-start=\"2583\" data-end=\"2586\" \/>\u2705 <strong data-start=\"2588\" data-end=\"2612\">Distributor Included<\/strong> \u2013 <strong data-start=\"2615\" data-end=\"2650\">Ensures precise ignition timing<\/strong><br data-start=\"2650\" data-end=\"2653\" \/>\u2705 <strong data-start=\"2655\" data-end=\"2701\">Oil Pan, Timing Cover, &amp; Harmonic Balancer<\/strong> \u2013 <strong data-start=\"2704\" data-end=\"2753\">Complete package for hassle-free installation<\/strong><br data-start=\"2753\" data-end=\"2756\" \/>\u2705 <strong data-start=\"2758\" data-end=\"2795\">2-Year Unlimited Mileage Warranty<\/strong> \u2013 <strong data-start=\"2798\" data-end=\"2843\">Peace of mind for performance enthusiasts<\/strong><\/p>\n<p data-start=\"2847\" data-end=\"2927\">\u26a0\ufe0f <strong data-start=\"2850\" data-end=\"2925\">Excludes water pump, flexplate, flywheel, spark plugs, and air cleaner.<\/strong><\/p>\n<hr data-start=\"2929\" data-end=\"2932\" \/>\n<h2 data-start=\"2934\" data-end=\"2970\"><strong data-start=\"2937\" data-end=\"2968\">  Technical Specifications<\/strong><\/h2>\n<div class=\"overflow-x-auto contain-inline-size\">\n<table data-start=\"2972\" data-end=\"4322\">\n<thead data-start=\"2972\" data-end=\"3001\">\n<tr data-start=\"2972\" data-end=\"3001\">\n<th data-start=\"2972\" data-end=\"2986\"><strong data-start=\"2974\" data-end=\"2985\">Feature<\/strong><\/th>\n<th data-start=\"2986\" data-end=\"3001\"><strong data-start=\"2988\" data-end=\"2999\">Details<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"3030\" data-end=\"4322\">\n<tr data-start=\"3030\" data-end=\"3055\">\n<td><strong data-start=\"3032\" data-end=\"3041\">Brand<\/strong><\/td>\n<td>Edelbrock<\/td>\n<\/tr>\n<tr data-start=\"3056\" data-end=\"3093\">\n<td><strong data-start=\"3058\" data-end=\"3083\">Manufacturer\u2019s Part #<\/strong><\/td>\n<td>49557<\/td>\n<\/tr>\n<tr data-start=\"3094\" data-end=\"3140\">\n<td><strong data-start=\"3096\" data-end=\"3112\">Product Type<\/strong><\/td>\n<td>Long Block Crate Engine<\/td>\n<\/tr>\n<tr data-start=\"3141\" data-end=\"3181\">\n<td><strong data-start=\"3143\" data-end=\"3167\">Summit Racing Part #<\/strong><\/td>\n<td>EDL-49557<\/td>\n<\/tr>\n<tr data-start=\"3182\" data-end=\"3227\">\n<td><strong data-start=\"3184\" data-end=\"3207\">Crate Engine Family<\/strong><\/td>\n<td>Chevy Big Block<\/td>\n<\/tr>\n<tr data-start=\"3228\" data-end=\"3275\">\n<td><strong data-start=\"3230\" data-end=\"3253\">Actual Displacement<\/strong><\/td>\n<td>9.1L \/ 555 C.I.D.<\/td>\n<\/tr>\n<tr data-start=\"3276\" data-end=\"3303\">\n<td><strong data-start=\"3278\" data-end=\"3292\">Horsepower<\/strong><\/td>\n<td>723 HP<\/td>\n<\/tr>\n<tr data-start=\"3304\" data-end=\"3330\">\n<td><strong data-start=\"3306\" data-end=\"3316\">Torque<\/strong><\/td>\n<td>652 lb-ft<\/td>\n<\/tr>\n<tr data-start=\"3331\" data-end=\"3365\">\n<td><strong data-start=\"3333\" data-end=\"3354\">Compression Ratio<\/strong><\/td>\n<td>10.0:1<\/td>\n<\/tr>\n<tr data-start=\"3366\" data-end=\"3392\">\n<td><strong data-start=\"3368\" data-end=\"3382\">Assembled?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"3393\" data-end=\"3433\">\n<td><strong data-start=\"3395\" data-end=\"3412\">Camshaft Type<\/strong><\/td>\n<td>Hydraulic Roller<\/td>\n<\/tr>\n<tr data-start=\"3434\" data-end=\"3503\">\n<td><strong data-start=\"3436\" data-end=\"3460\">Cam Lift (Int.\/Exh.)<\/strong><\/td>\n<td><strong data-start=\"3463\" data-end=\"3501\">.594 in. intake \/ .594 in. exhaust<\/strong><\/td>\n<\/tr>\n<tr data-start=\"3504\" data-end=\"3564\">\n<td><strong data-start=\"3506\" data-end=\"3529\">Cam Duration @ 0.50<\/strong><\/td>\n<td><strong data-start=\"3532\" data-end=\"3562\">242\u00b0 Intake \/ 240\u00b0 Exhaust<\/strong><\/td>\n<\/tr>\n<tr data-start=\"3565\" data-end=\"3638\">\n<td><strong data-start=\"3567\" data-end=\"3595\">Cylinder Heads Included?<\/strong><\/td>\n<td>\u2705 Yes (Edelbrock E-CNC Aluminum Heads)<\/td>\n<\/tr>\n<tr data-start=\"3639\" data-end=\"3692\">\n<td><strong data-start=\"3641\" data-end=\"3656\">Fuel System<\/strong><\/td>\n<td>\u2705 EFI (Pro-Flo 4 XT Multi-Port)<\/td>\n<\/tr>\n<tr data-start=\"3693\" data-end=\"3730\">\n<td><strong data-start=\"3695\" data-end=\"3720\">Distributor Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"3731\" data-end=\"3785\">\n<td><strong data-start=\"3733\" data-end=\"3759\">Valve Covers Included?<\/strong><\/td>\n<td>\u2705 Yes (Cast Aluminum)<\/td>\n<\/tr>\n<tr data-start=\"3786\" data-end=\"3824\">\n<td><strong data-start=\"3788\" data-end=\"3814\">Timing Cover Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"3825\" data-end=\"3858\">\n<td><strong data-start=\"3827\" data-end=\"3848\">Oil Pan Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"3859\" data-end=\"3902\">\n<td><strong data-start=\"3861\" data-end=\"3892\">Harmonic Balancer Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"3903\" data-end=\"3938\">\n<td><strong data-start=\"3905\" data-end=\"3929\">Water Pump Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"3939\" data-end=\"3973\">\n<td><strong data-start=\"3941\" data-end=\"3964\">Flexplate Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"3974\" data-end=\"4007\">\n<td><strong data-start=\"3976\" data-end=\"3998\">Flywheel Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"4008\" data-end=\"4044\">\n<td><strong data-start=\"4010\" data-end=\"4035\">Air Cleaner Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"4045\" data-end=\"4081\">\n<td><strong data-start=\"4047\" data-end=\"4072\">Spark Plugs Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"4082\" data-end=\"4123\">\n<td><strong data-start=\"4084\" data-end=\"4114\">Spark Plug Wires Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"4124\" data-end=\"4158\">\n<td><strong data-start=\"4126\" data-end=\"4148\">Computer Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"4159\" data-end=\"4199\">\n<td><strong data-start=\"4161\" data-end=\"4189\">Wiring Harness Included?<\/strong><\/td>\n<td>\u2705 Yes<\/td>\n<\/tr>\n<tr data-start=\"4200\" data-end=\"4237\">\n<td><strong data-start=\"4202\" data-end=\"4228\">Supercharger Included?<\/strong><\/td>\n<td>\u274c No<\/td>\n<\/tr>\n<tr data-start=\"4238\" data-end=\"4286\">\n<td><strong data-start=\"4240\" data-end=\"4252\">Warranty<\/strong><\/td>\n<td><strong data-start=\"4255\" data-end=\"4284\">2 Years \/ Unlimited Miles<\/strong><\/td>\n<\/tr>\n<tr data-start=\"4287\" data-end=\"4322\">\n<td><strong data-start=\"4289\" data-end=\"4300\">Sold As<\/strong><\/td>\n<td>Individual Engine<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p data-start=\"4324\" data-end=\"4387\">  <strong data-start=\"4327\" data-end=\"4385\">Designed for maximum horsepower &amp; seamless EFI tuning!<\/strong><\/p>\n<hr data-start=\"4389\" data-end=\"4392\" \/>\n<h2 data-start=\"4394\" data-end=\"4429\"><strong data-start=\"4397\" data-end=\"4427\">  Fitment &amp; Compatibility<\/strong><\/h2>\n<p data-start=\"4431\" data-end=\"4728\">\u2714 <strong data-start=\"4433\" data-end=\"4514\">Designed for Big Block Chevy Applications (Camaro, Chevelle, Nova, C10, etc.)<\/strong><br data-start=\"4514\" data-end=\"4517\" \/>\u2714 <strong data-start=\"4519\" data-end=\"4593\">Ideal for muscle cars, drag racing, and high-performance street builds<\/strong><br data-start=\"4593\" data-end=\"4596\" \/>\u2714 <strong data-start=\"4598\" data-end=\"4652\">Works with both automatic and manual transmissions<\/strong><br data-start=\"4652\" data-end=\"4655\" \/>\u2714 <strong data-start=\"4657\" data-end=\"4726\">Advanced EFI system for improved fuel economy &amp; throttle response<\/strong><\/p>\n<p data-start=\"4730\" data-end=\"4796\">  <strong data-start=\"4733\" data-end=\"4794\">Ensure compatibility with your vehicle before purchasing.<\/strong><\/p>\n<hr data-start=\"4798\" data-end=\"4801\" \/>\n<h2 data-start=\"4803\" data-end=\"4851\"><strong data-start=\"4806\" data-end=\"4849\">  Installation Notes &amp; Recommendations<\/strong><\/h2>\n<p data-start=\"4853\" data-end=\"5095\">  <strong data-start=\"4856\" data-end=\"4897\">Professional Installation Recommended<\/strong> \u2013 <strong data-start=\"4900\" data-end=\"4938\">Requires proper break-in procedure<\/strong><br data-start=\"4938\" data-end=\"4941\" \/>\u2699\ufe0f <strong data-start=\"4944\" data-end=\"4988\">Pre-Tuned for Performance &amp; Driveability<\/strong> \u2013 <strong data-start=\"4991\" data-end=\"5028\">Minimal tuning adjustments needed<\/strong><br data-start=\"5028\" data-end=\"5031\" \/>  <strong data-start=\"5034\" data-end=\"5093\">Use the Bluetooth E-Tuner App for Real-Time Adjustments<\/strong><\/p>\n<p data-start=\"5097\" data-end=\"5171\">\u26a0\ufe0f <strong data-start=\"5100\" data-end=\"5169\">Some additional components may be required for full installation.<\/strong><\/p>\n<hr data-start=\"5173\" data-end=\"5176\" \/>\n<h2 data-start=\"5178\" data-end=\"5221\"><strong data-start=\"5181\" data-end=\"5219\">\u2753 Frequently Asked Questions (FAQ)<\/strong><\/h2>\n<p data-start=\"5223\" data-end=\"5275\">  <strong data-start=\"5226\" data-end=\"5273\">Is this engine fuel injected or carbureted?<\/strong><\/p>\n<ul data-start=\"5276\" data-end=\"5357\">\n<li data-start=\"5276\" data-end=\"5357\"><strong data-start=\"5278\" data-end=\"5355\">This engine comes with the Pro-Flo 4 XT Electronic Fuel Injection system.<\/strong><\/li>\n<\/ul>\n<p data-start=\"5359\" data-end=\"5404\">  <strong data-start=\"5362\" data-end=\"5402\">Does this engine require a computer?<\/strong><\/p>\n<ul data-start=\"5405\" data-end=\"5479\">\n<li data-start=\"5405\" data-end=\"5479\"><strong data-start=\"5407\" data-end=\"5477\">Yes, the included ECU controls the EFI system and ignition timing.<\/strong><\/li>\n<\/ul>\n<p data-start=\"5481\" data-end=\"5538\">  <strong data-start=\"5484\" data-end=\"5536\">Can I tune this engine with the included tablet?<\/strong><\/p>\n<ul data-start=\"5539\" data-end=\"5632\">\n<li data-start=\"5539\" data-end=\"5632\"><strong data-start=\"5541\" data-end=\"5630\">Yes, the 7&#8243; Android tablet connects via Bluetooth for real-time tuning &amp; adjustments.<\/strong><\/li>\n<\/ul>\n<p data-start=\"5634\" data-end=\"5678\">  <strong data-start=\"5637\" data-end=\"5676\">What vehicles does this engine fit?<\/strong><\/p>\n<ul data-start=\"5679\" data-end=\"5774\">\n<li data-start=\"5679\" data-end=\"5774\"><strong data-start=\"5681\" data-end=\"5772\">It fits most Big Block Chevy applications but requires custom mounting for some models.<\/strong><\/li>\n<\/ul>\n<p data-start=\"5776\" data-end=\"5817\">  <strong data-start=\"5779\" data-end=\"5815\">What fuel octane is recommended?<\/strong><\/p>\n<ul data-start=\"5818\" data-end=\"5884\">\n<li data-start=\"5818\" data-end=\"5884\"><strong data-start=\"5820\" data-end=\"5882\">Premium 91+ octane is recommended for optimal performance.<\/strong><\/li>\n<\/ul>\n<p data-start=\"5886\" data-end=\"5940\">  <strong data-start=\"5889\" data-end=\"5938\">Does this engine work with stock accessories?<\/strong><\/p>\n<ul data-start=\"5941\" data-end=\"6011\">\n<li data-start=\"5941\" data-end=\"6011\"><strong data-start=\"5943\" data-end=\"6009\">Some modifications may be required for belt &amp; bracket fitment.<\/strong><\/li>\n<\/ul>\n<p data-start=\"6013\" data-end=\"6060\">  <strong data-start=\"6016\" data-end=\"6058\">What kind of oil does this engine use?<\/strong><\/p>\n<ul data-start=\"6061\" data-end=\"6163\">\n<li data-start=\"6061\" data-end=\"6163\"><strong data-start=\"6063\" data-end=\"6161\">Use high-zinc break-in oil for the first 500 miles, then switch to high-performance synthetic.<\/strong><\/li>\n<\/ul>\n<hr data-start=\"6165\" data-end=\"6168\" \/>\n<h2 data-start=\"6170\" data-end=\"6244\"><strong data-start=\"6173\" data-end=\"6242\">  Order Your Edelbrock\/Musi 555 Pro-Flo 4 XT Crate Engine Today!<\/strong><\/h2>\n<p data-start=\"6246\" data-end=\"6339\">  <strong data-start=\"6249\" data-end=\"6337\">Dominate the street &amp; track with this dyno-tested, EFI-powered 555 C.I.D. Big Block!<\/strong><\/p>\n<p data-start=\"6341\" data-end=\"6515\">\u2714 <strong data-start=\"6343\" data-end=\"6372\">723 HP &amp; 652 lb-ft Torque<\/strong><br data-start=\"6372\" data-end=\"6375\" \/>\u2714 <strong data-start=\"6377\" data-end=\"6416\">Self-Tuning Pro-Flo 4 XT EFI System<\/strong><br data-start=\"6416\" data-end=\"6419\" \/>\u2714 <strong data-start=\"6421\" data-end=\"6464\">Forged Internals for Extreme Durability<\/strong><br data-start=\"6464\" data-end=\"6467\" \/>\u2714 <strong data-start=\"6469\" data-end=\"6513\">Bluetooth ECU with Real-Time Adjustments<\/strong><\/p>\n<p data-start=\"6517\" data-end=\"6576\">  <strong data-start=\"6520\" data-end=\"6569\">DON\u2019T WAIT \u2013 LIMITED AVAILABILITY! ORDER NOW!<\/strong>  <\/p>\n<p data-start=\"6517\" data-end=\"6576\">\n<h3>Edelbrock 49557 details<\/h3>\n<div>\n<div>\n<div class=\"p p-color-none p-font-regular p-1\">\n<div class=\"sc-iTFTee hsGFXc Html_dangerousHtml__kxnxq\">\n<p>The Edelbrock\/Musi 555 Pro-Flo 4 XT is the most powerful package in our line and features the Pro-Flo 4 XT electronic fuel injection. The Pro-Flo 4 XT EFI system consists of a front mount 90mm throttle body design manifold with a large plenum and tapered runners that deliver more horsepower and torque than a traditional single-plane intake manifold. The system also includes fuel injectors, fuel rails, throttle body, electronic engine control unit (ECU).<\/p>\n<p>Like the Pro-Flo 4 single-plane application, this engine is ready to run right out of the crate with pre-loaded calibrations. The E-Tuner app uses a Bluetooth wireless connection to communicate with the ECU\u2019s self-learning capability to continually adjust the calibration to get the maximum performance of your engine.<\/p>\n<ul>\n<li>Displacement: 555 c.i.d.<\/li>\n<li>Horsepower: 723 hp<\/li>\n<li>Torque: 652 ft-lbs<\/li>\n<li>Compression: 10.0:1<\/li>\n<li>Block: Big-Block (9.8&#8243; deck height)<\/li>\n<li>Crankshaft: Forged Steel 4.250&#8243;<\/li>\n<li>Pistons: Forged<\/li>\n<li>Camshaft: Rollin\u2019 Thunder Hydraulic Roller #2264<\/li>\n<li>Rocker Arms: 1.7:1 Roller #77790<\/li>\n<li>EFI Systems: Pro-Flo 4 XT #35883<\/li>\n<li>Cylinder Heads: E-CNC #79555<\/li>\n<li>Distributor: Included<\/li>\n<li>Valve Covers: Cast Aluminum<\/li>\n<li>Warranty: 2-Year \/ Unlimited Mileage<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"p p-color-none p-font-bold p-1\" data-testid=\"details_Charts\">Charts<\/h3>\n<div>\n<div class=\"p p-color-none p-font-regular p-1\">\n<div class=\"sc-iTFTee hsGFXc Html_dangerousHtml__kxnxq\">\n<ul>\n<li>\n<h4><a href=\"https:\/\/static.Elevemotorsmotors.com\/pdf\/32546127.pdf\" target=\"_blank\" rel=\"noopener\">Edelbrock Limited Warranty Registration Form<\/a> (PDF)<\/h4>\n<\/li>\n<li>\n<h4><a style=\"font-size: 18px;\" href=\"https:\/\/static.Elevemotorsmotors.com\/pdf\/32546127_1.pdf\" target=\"_blank\" rel=\"noopener\">Edelbrock Crate Engine Valve Adjustment<\/a><span style=\"color: #1b1919; font-size: 18px;\">\u00a0(PDF)<\/span><\/h4>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div>\n<div class=\"sc-hBxehG frYAUl details_guides_documents_divider__Xdkaw Divider_divider__Q7_HU\" role=\"separator\" data-testid=\"guides_docs_section\"><\/div>\n<h3 id=\"pdp_details_guides_docs\" class=\"p p-color-none p-font-bold p-1 details_pdp_details_guides_docs__lg2y7\">Guides &amp; Documents<\/h3>\n<ul>\n<li class=\"digitalAssets_digital_asset_container__H_m_4\">\n<h4><a class=\"p p-color-none p-font-regular p-0_875 TextLink_text_link__ejdvr p-underline p-hover p-inline\" href=\"https:\/\/content.Elevemotorsmotors.com\/DigitalAssets\/assets\/testing\/32549557_INS_2021_2.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" data-testid=\"digital_assets_textlink_Crate Engines Instru\">Crate Engines Instruction Sheet (32549557)(PDF)<\/a><\/h4>\n<\/li>\n<li class=\"digitalAssets_digital_asset_container__H_m_4\">\n<h4><a class=\"p p-color-none p-font-regular p-0_875 TextLink_text_link__ejdvr p-underline p-hover p-inline\" style=\"font-size: 18px;\" href=\"https:\/\/content.Elevemotorsmotors.com\/DigitalAssets\/assets\/charts\/32549557_WAR_2022_1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" data-testid=\"digital_assets_textlink_Crate Engines Guide\/\">Crate Engines Guide\/Document (32549557)(PDF)<\/a><\/h4>\n<\/li>\n<\/ul>\n<\/div>\n<p>&nbsp;<\/p>\n<table class=\"specs_specs__tWUcm attribute-container\" style=\"height: 999px;\" width=\"1136\">\n<thead>\n<tr>\n<th class=\"p p-color-none p-font-heading p-1 specs_spec_heading__aN181\">\n<h4>KEY SPECS<\/h4>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_MFG. Part #\"><strong>MFG. Part #<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_MFG. Part #\">49557<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Brand\"><strong>Brand<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Brand\">Edelbrock<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Crate Engine Type\"><strong>Crate Engine Type<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Crate Engine Type\">Long Block<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Engine Displacement\"><strong>Engine Displacement<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Engine Displacement\">555 cu. in.<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Compression Ratio\"><strong>Compression Ratio<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Compression Ratio\">10.0:1<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Camshaft Type\"><strong>Camshaft Type<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Camshaft Type\">Hydraulic Roller Tappet<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Cylinder Head Material\"><strong>Cylinder Head Material<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Cylinder Head Material\">Aluminum<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Carburetor Included\"><strong>Carburetor Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Carburetor Included\">No<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Intake Manifold Included\"><strong>Intake Manifold Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Intake Manifold Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Distributor Included\"><strong>Distributor Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Distributor Included\">Yes<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Valve Covers Included\"><strong>Valve Covers Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Valve Covers Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Engine Balance\"><strong>Engine Balance<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Engine Balance\">Internal\/External<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Cylinder Heads Included\"><strong>Cylinder Heads Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Cylinder Heads Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Rear Main Seal Style\"><strong>Rear Main Seal Style<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Rear Main Seal Style\">1-piece<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Throttle Body Included\"><strong>Throttle Body Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Throttle Body Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Oil Pan Included\"><strong>Oil Pan Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Oil Pan Included\">Yes<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Timing Cover Included\"><strong>Timing Cover Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Timing Cover Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Water Pump Included\"><strong>Water Pump Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Water Pump Included\">No<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Harmonic Balancer Included\"><strong>Harmonic Balancer Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Harmonic Balancer Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Flexplate Included\"><strong>Flexplate Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Flexplate Included\">No<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Flywheel Included\"><strong>Flywheel Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Flywheel Included\">No<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Air Cleaner Included\"><strong>Air Cleaner Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Air Cleaner Included\">No<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Spark Plugs Included\"><strong>Spark Plugs Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Spark Plugs Included\">No<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Spark Plug Wires Included\"><strong>Spark Plug Wires Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Spark Plug Wires Included\">No<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Computer Included\"><strong>Computer Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Computer Included\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Wiring Harness Included\"><strong>Wiring Harness Included<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Wiring Harness Included\">Yes<\/td>\n<\/tr>\n<\/tbody>\n<tbody>\n<tr>\n<td colspan=\"2\">\n<div class=\"sc-hBxehG frYAUl specs_divider__Bh_kc Divider_divider__Q7_HU\" role=\"separator\"><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<thead>\n<tr>\n<th class=\"p p-color-none p-font-heading p-1 specs_spec_heading__aN181\">\n<h4>GENERAL<\/h4>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Assembled\"><strong>Assembled<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Assembled\">Yes<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_GTIN Code\"><strong>GTIN Code<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_GTIN Code\">085347495573<\/td>\n<\/tr>\n<tr>\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Notes\"><strong>Notes<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Notes\">Self tuning multi-port sequential injection.<\/td>\n<\/tr>\n<tr class=\"sc-iAEawV QhkLZ\">\n<td class=\"p p-color-none p-font-bold p-0_875 table_spec_title__T_Eyb\" data-testid=\"spec_title_Sold in Quantity\"><strong>Sold in Quantity<\/strong><\/td>\n<td class=\"p p-color-none p-font-regular p-0_875 table_spec_value__BROHc\" data-testid=\"spec_value_Sold in Quantity\">Each<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Edelbrock\/Musi 555 Pro-Flo 4 XT EFI Crate Engine \u2013 723 HP Big Block Powerhouse! Unleash 723 HP &amp; 652 LB-FT Torque with the Edelbrock\/Musi 555 Crate Engine! Block has a 9.8&#8243; deck height and a 10.0:1 compression ratio This 555 c.i. engine puts out an astonishing 723 horsepower and 652 ft. lb. of torque System [&#8230;]\n","protected":false},"featured_media":6201,"comment_status":"closed","ping_status":"open","template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[356],"product_tag":[],"class_list":["post-6200","product","type-product","status-publish","has-post-thumbnail","product_cat-crate-engines","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"exclude_global_add_ons":[],"addons":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Edelbrock 49557 Edelbrock\/Musi 555 RPM XT EFI 723 HP - Eleve Motors LLC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elevemotors.com\/it\/prodotto\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Edelbrock 49557 Edelbrock\/Musi 555 RPM XT EFI 723 HP - Eleve Motors LLC\" \/>\n<meta property=\"og:description\" content=\"Edelbrock\/Musi 555 Pro-Flo 4 XT EFI Crate Engine \u2013 723 HP Big Block Powerhouse! Unleash 723 HP &amp; 652 LB-FT Torque with the Edelbrock\/Musi 555 Crate Engine! Block has a 9.8&#8243; deck height and a 10.0:1 compression ratio This 555 c.i. engine puts out an astonishing 723 horsepower and 652 ft. lb. of torque System [...]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/elevemotors.com\/it\/prodotto\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\/\" \/>\n<meta property=\"og:site_name\" content=\"Eleve Motors LLC\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-17T14:44:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/elevemotors.com\/wp-content\/uploads\/2025\/09\/photo_2023-12-05_10-59-42.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"1280\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Prezzo\" \/>\n\t<meta name=\"twitter:data1\" content=\"&#036;16,295.28\" \/>\n\t<meta name=\"twitter:label2\" content=\"Availability\" \/>\n\t<meta name=\"twitter:data2\" content=\"In stock\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/elevemotors.com\\\/product\\\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\\\/\",\"url\":\"https:\\\/\\\/elevemotors.com\\\/product\\\/edelbrock-49557-edelbrock-musi-555-rpm-xt-efi-723-hp\\\/\",\"name\":\"Edelbrock 49557 Edelbrock\\\/Musi 555 RPM XT EFI 723 HP - 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