CT400 IMCA-Sealed 604 Crate Engine, Dyno Tested, Race Ready

Chevrolet Performance classifies this particular "604 crate" as a Deluxe build, built on a forged 4340-steel crankshaft under Fast Burn aluminum heads, with a 9.72:1 compression ratio and a recommended rpm ceiling of 5,800. Figure on 400 hp and 400 lb-ft of torque from this combination, the former arriving at 5,500 rpm and the latter at 4,500, with 92-octane fuel specified.

Valvetrain specifics

The 4.00-inch bore and 3.48-inch stroke sit beneath 1.5:1-ratio aluminum roller rockers working 2.00-inch intake and 1.55-inch exhaust valves. A 112-degree lobe separation ties together a cam ground to .474 inch of lift on the intake side and .510 on the exhaust, with respective durations of 208 and 221 degrees.

What ships and the fine print

Cylinder heads, intake manifold, valve covers, oil pan, and timing cover arrive already on the engine, along with an 8-quart oil pan and harmonic balancer; a carburetor, distributor, water pump, and spark plug wires are not included. Worth noting before you buy: no warranty applies to this engine, and its emissions notice restricts it strictly to racing vehicles that are never registered or licensed for use on a public highway in California.

Q: Is a distributor included? No, this package does not include a distributor.

Q: Can I register a vehicle with this engine for street use in California? No, this engine is built for racing competition vehicles only, not for public-road registration.