17802825 COPO 427 cid
425 HP

The COPO 427 for A Stock competition uses the large-borecylinder block and high-flow cylinder heads of the LS7 engineand complements them with a high-compression rotatingassembly to deliver big power from its large displacement. Itslightweight aluminum block and heads revive the spirit of theoriginal ZL1 all-aluminum 427 big-block that helped forge theCOPO legacy in 1969.

SPECS
Displacement: 427 cu in (7.0L)
Compression Ratio: 13.5:1
Cylinder Block: LS7 cast aluminum
Bore x Stroke (in): 4.125 x 4.100
Crankshaft: forged steel
Connecting Rods: forged steel
Pistons: forged dome
Cylinder Heads: LS7 aluminum
Induction: natural
Intake Manifold: Holley
Camshaft Type: hydraulic roller
Camshaft Lift (int./exh.): .595/.595-inch

Now available! call for details.