Roush 427IR Crate Engine (BD427IRC) – High-Performance Power for Street & Track!

Unleash raw power with the Roush 427IR Crate Engine!

The Roush 427IR Crate Engine (BD427IRC) is a high-displacement, naturally aspirated monster, optimized for raw power and exceptional durability. With its race-ready internals, high-flow induction system, and precision tuning, this crate engine is the ultimate choice for muscle car enthusiasts and competitive racers.

A powerhouse designed to push the limits of speed, performance, and acceleration!

⚠️ Requires custom fuel system, ignition, and tuning for optimal performance.

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What’s Included in the Roush 427IR Crate Engine?

✅ High-Performance Engine Block & Heads – Engineered for maximum strength and power output
✅ Internally Balanced Rotating Assembly – Ensures smooth, high-RPM operation
✅ Race-Optimized Cylinder Heads – Enhances airflow, fuel atomization, and combustion efficiency
✅ Custom-Tuned Induction System – Delivers instant throttle response and explosive acceleration
✅ Performance Camshaft & Valvetrain – Designed for high lift and duration, maximizing powerband

⚠️ EXCLUDES fuel injection system, ignition system, computer, wiring harness, and exhaust components.

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Technical Specifications

Built for maximum torque, horsepower, and high-RPM performance!

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Fitment & Compatibility

✔ Perfect for high-performance street builds, drag racing, and pro-touring applications
✔ Designed for seamless integration with aftermarket fuel injection or carburetor setups
✔ Ideal for classic muscle cars, custom hot rods, and high-horsepower builds

Ensure your vehicle’s fuel and ignition system can handle the power of this extreme crate engine!

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Installation Notes & Recommendations

Professional Installation Required – Ensures correct fitment, tuning, and peak performance
⚙️ Requires Aftermarket Fuel System & Ignition – Not included with the crate engine
Designed for High-Octane Performance Fuel – Requires premium or race fuel for optimal results

⚠️ Not emissions-certified—intended for off-road or racing applications.

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❓ Frequently Asked Questions (FAQ)

What is the horsepower and torque output of this engine?

• The Roush 427IR Crate Engine is designed for extreme horsepower and torque, with exact figures depending on fuel setup, tuning, and supporting modifications. Contact Roush for dyno specifications.

Does this engine come with an ECU and wiring harness?

• No, this engine requires a standalone ECU and custom tuning for optimal performance.

Can I install this engine in a street car?

• Yes! While primarily designed for high-performance builds, this engine can be used in street applications with proper emissions and tuning modifications.

What fuel does this engine require?

• Premium 91+ octane fuel or racing fuel is recommended for maximum performance and engine longevity.

Does it include forced induction?

• No, but it is compatible with aftermarket superchargers or turbocharger setups.

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Order Your Roush 427IR Crate Engine Today!

Upgrade your classic muscle car or custom build with the high-performance Roush 427IR Crate Engine!

✔ Massive 427 C.I.D Displacement for Extreme Power
✔ Built for High-RPM Racing & Street Domination
✔ Dyno-Tested & Proven for Track and Street Use
✔ Designed for Custom Builds, Drag Racing, and Pro-Touring Applications

ORDER NOW & EXPERIENCE UNMATCHED PERFORMANCE!