Chevrolet Performance's COPO crate engines are engineered for NHRA's Stock Eliminator and Super Stock classes, offering sportman racers a range of factory-developed-and-assembled racing engines.
The 350, 396 and 427 naturally aspirated engines make a race car eligible for NHRA Stock Eliminator classes from AA/S to D/S, based primarily on weight and horsepower ratings. The 350 S/C engine makes cars eligible for AAA/S and AA/S classes. Consult the NHRA rule book at nhra.com for class and compliance guidelines.
Chevrolet Performance engineers designed and tested the engines with the same methods used to develop production engines, ensuring their performance and durability; and each engine is hand-assembled in a specially built facility.
COPO 427 - 390 hp
A proven combination, the COPO 427 gets a lighter, custom aluminum oil pan and a 90mm throttle body as standard equipment. The lightweight LS7 block and smaller throttle body should prove to be a real winner in your late model COPO Camaro.
Displacement: 427 cu in (7.0L)
Compression Ratio: 13.5:1
Cylinder Block: LS7 cast aluminum
Bore x Stroke (in): 4.125 x 4.000
Crankshaft: Forged steel
Connecting Rods: Forged steel
Pistons: Forged dome
Cylinder Heads: LS7 aluminum
Induction: Natural - EFI
Intake Manifold: Holley Hi-Ram
Camshaft Type: Hydraulic roller
Camshaft Lift (int./exh.): .630/.630-inch
Camshaft Duration (int./exh.): 233/276 deg. @ .050-inch