Roush Industries Inc. Crate Engines BD427IRC

A Roush 427IR crate engine (part number BD427IRC), a naturally aspirated 7.0-liter block built with a high-performance cast-iron block and aluminum heads, internally balanced, for buyers assembling their own induction and ignition system around it.

What this crate engine includes

The engine ships assembled with a high-performance hydraulic roller camshaft, a 1-piece rear main seal, and an induction system, along with the oil pan, valve covers, and timing cover installed. It does not include a carburetor, throttle body, distributor, water pump, harmonic balancer, flexplate, flywheel, air cleaner, spark plugs or wires, computer, wiring harness, or supercharger, so plan to source a fuel system, ignition, and cooling setup to finish the build.

What to check before buying

Because this is a bare, race-oriented long block rather than a turnkey engine, confirm your planned fuel injection or carburetor setup, ignition system, and tuning plan are ready before the engine arrives. Premium or race fuel at 91-octane or higher is recommended, and the engine is not emissions-certified, so it is intended for off-road, racing, or custom-build applications rather than a direct street-emissions-compliant swap.

Common questions

Does it come with a carburetor? No, a carburetor is not included.

What's the displacement? 7.0 liters, or 427 cubic inches.

Is it supercharger compatible? It can be paired with an aftermarket supercharger or turbocharger setup.

Specifications