SKU: GMP19433409
MPN: 19433409
The Chevrolet Performance 454 crate engine represents authentic big-block muscle in a factory-assembled package. This 454 cubic-inch powerplant produces 438 horsepower at 5,000 revolutions per minute and 500 lb-ft of torque at 3,500 revolutions per minute — numbers that made the original Mark IV legendary. Built for enthusiasts restoring classic muscle cars, constructing period-correct hot rods, or upgrading trucks that need serious towing capability, this engine arrives ready to install with all internal components precisely assembled to Chevrolet's specifications. We stock this alongside our complete parts and accessories inventory for builders who demand factory-backed reliability.
Chevrolet engineers the 454 crate engine around a cast-iron block with four-bolt main bearing caps on the center three journals, providing the bottom-end strength required for sustained high-output operation. The oval-port iron cylinder heads flow efficiently without aftermarket modifications, paired with a hydraulic roller camshaft that delivers strong mid-range torque while maintaining streetable idle quality. The aluminum intake manifold accepts square-bore carburetors up to 750 cubic feet per minute, and the high-energy ignition distributor provides reliable spark timing. Internal rotating assembly includes forged steel connecting rods and cast aluminum pistons running a 8.75:1 compression ratio — low enough to run on pump gasoline while still producing substantial power.
This 454 crate engine fits applications where displacement matters: heavy muscle cars like the Chevelle SS and Caprice, full-size trucks requiring real towing power, and marine applications where torque availability beats high-revving output. The engine ships as a long-block with intake, carburetor, distributor, and water pump — add headers, an exhaust system, and accessories to complete your build. We recommend pairing with a TH400 or 4L80E transmission for street applications. Browse our firearms selection or explore our broader catalog for your project needs.
| Specification | Detail |
|---|---|
| Brand | CHEVROLET PERFORMANCE |
| Model/MPN | 19433409 |
| SKU | GMP19433409 |
| Shipping Weight | 677 lbs |
| Displacement | 454 cubic inches (7.4L) |
| Horsepower | 438 hp @ 5,000 rpm |
| Torque | 500 lb-ft @ 3,500 rpm |
| Compression Ratio | 8.75:1 |
| Block Material | Cast Iron |
| Cylinder Head Material | Cast Iron, Oval Port |
| Camshaft Type | Hydraulic Roller |
| Intake Manifold | Aluminum, Square-Bore |
| Fuel Requirement | Pump Gasoline |
The TH400 automatic is the traditional pairing for big-block Chevrolet applications, offering proven durability under high-torque loads. The 4L80E provides overdrive capability for highway cruising and improved fuel economy. Manual options include the Muncie M22 for period builds or a T56 six-speed for modern street performance.
Yes. The 8.75:1 compression ratio allows the engine to run on 87-octane regular unleaded fuel without detonation issues. This conservative compression makes the engine compatible with today's ethanol-blended fuels while still producing 438 horsepower and 500 lb-ft of torque.
Chevrolet Performance ships this as a complete long-block with intake manifold, carburetor, water pump, and high-energy ignition distributor installed. You will need to supply headers or exhaust manifolds, accessory drive components, starter, alternator, and radiator hoses to complete the installation.
This engine arrives with major components installed but requires additional parts for operation. Headers, an accessory drive system, cooling system components, and wiring are not included. Plan on approximately four to six hours of additional assembly time beyond setting the engine in place.
Common applications include 1965-1972 Chevelle, 1967-1969 Camaro, 1965-1970 Impala and Caprice, and full-size trucks from the C/K series. The engine also sees use in marine applications and off-road vehicles where low-end torque matters more than high-revving power delivery.
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