Cummins Engine Swap Kits

CMW Trucks - 1947 - 1972 Chevy Truck Parts


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ZZ502 Deluxe Kit

You must assemble the major components of this engine to make what you see in the photo to the right.

Building on the very popular ZZ502/502 Base engine kit, GM Performance Parts offers you the Deluxe version of that same engine combination. The Deluxe ZZ502/502 kit gives you the opportunity to get all the parts you need in one box to build your own high performance big-block Chevy. By offering you a tested combination of parts, GM Performance Parts has taken all of the frustration out of putting your own engine together—no mismatched parts that don’t work together. When assembled and installed, you get a Rat motor that cranks out 502 horsepower (one horsepower per cubic inch) and 567 lb.-ft. of torque.

For the ZZ502/502 Deluxe kit, GMPP took the ZZ502/502 Base engine kit and added to it a Holley 850-cfm four-barrel carburetor, starter, distributor, plug wires, and water pump. Together, they add up to a GMPP-tested and validated 502 horsepower and a stunning 567 lb.-ft. of torque at the crack of the throttle. Imagine the satisfaction that you’ll feel when you fire it up for the first time.

NOTE: Intended for pre-1977 street vehicles and all off-road vehicles. Not intended for marine use.

Possible Applications

  • Anything that you want to have over 500 horsepower in
  • The perfect drag racing foundation
  • A hot rod that you want to get noticed in for more than the paint quality

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

Part Number: 12371171
Displacement (cu in): 502
Bore x stroke (in): 4.47 x 4.00
Block (P/N 10237292): Cast iron with 4-bolt main caps
Crankshaft (P/N 10183723): Forged steel
Connecting rods (P/N 10198922): Forged steel, shot peened
Pistons (P/N 12533507): Forged aluminum
Camshaft type (P/N 12366543): Hydraulic roller
Camshaft lift (in): .527 intake / .544 exhaust
Camshaft duration (@.050 in): 224'c1 intake / 234'c1 exhaust
Cylinder heads (P/N 12363390): Aluminum oval port; 110cc chambers
Valve size (in): 2.25 intake / 1.88 exhaust; stain less steel
Compression ratio: 9.6:1
Rocker Arms (P/N 12368082): Stamped steel
Rocker arm ratio: 1.7:1
Distributor (P/N 93440806): HEI type
Carburetor (P/N 12366996): 850 cfm
Water pump (P/N 14058915): Aluminum, short-style
Spark plugs & wires: Included
Starter (P/N 9000852): Included
Flexplate (P/N 10185034): 14"
Recommended fuel: 92 octane
Ignition timing: 8'c1 BTDC @ 800 rpm; 36'c1 total @ 5000 rpm
Maximum rpm: 5800

Chevy Performance ZZ502 Deluxe Kit Engine Image

Part #: 12371171

zz 502 dyno image

Installation Notes

  • NOTE: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur. GMPP distributor P/N 93440806 is recommended.
  • This is a kit and comes in pieces. You must install heads, valve covers, intake, carburetor, water pump, distributor etc.
  • Intended for pre-1977 street vehicles or all off-road vehicles.
  • Not intended for marine applications.