ZZ502/502 BASE BIG BLOCK GM Performance Crate Engine – 12496963

Parts #12496963

502 hp @ 5,200 rpm 567 lb.-ft. @ 4,200 rpm The DIY foundation for big torque!

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It’s simple:We offer the ZZ502/502 Base crate engine for the builder who wants the super-strong bottom end and high-flow aluminum oval-port cylinder heads,but also wants to finish the engine their way.

The ZZ502/502 Base Engine uses our new cylinder block casting that is stronger and better suited to high-performance combinations.

• A forged steel crankshaft,forged rods and forged pistons form the reciprocating assembly,with a smooth-operating hydraulic roller camshaft delivering big 0.527/0.544-inch lift.
• The lightweight aluminum heads boast 110cc combustion chambers and big,2.25-inch intake and 1.88-inch exhaust valves.
• We rate the ZZ502/502 Base engine at 502 horsepower and 567 lb.-ft. of torque when it is finished with GMPP aluminum intake manifold P/N 12363406 and Holley 870-cfm carburetor P/N 19170094.
• The other parts you need to complete the engine – including chrome dress-up parts – are available from your GMPP dealer and gmperformanceparts.com.

The ZZ502/502 Base is a great foundation. It’s up to you to make the most of it.

INSTALLATION NOTES

• Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds,lower head bolts may need to be replaced with bolts with shorter heads for clearance
• 502 engines now have a mechanical fuel pump boss!
• Comes with an externally balanced 14” automatic transmission flexplate. Use flywheel P/N 14096987 and 11” clutch assembly for manual transmission applications
• Designed for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications