GM Performance Parts designed our Fast Burn aluminum performance cylinder heads for small-block applications just like our Fast Burn 385 turn-key crate engine. Engineered to meet the demands of a hungry small-block with an aggressive camshaft, the Fast Burn cylinder heads are the featured component on this awesome small-block Chevy crate engine. The Fast Burn 385 blends the ZZ4 350 short block with the latest in cylinder head technology. With this hot turn-key option, all you need to do is install it, add the fuel, add 12V power, and go start some trouble.

Rated at 385 horsepower and 385 lb.-ft. of torque, the Fast Burn 385 is all ZZ4 inside the crank case including the forged steel crankshaft, hypereutectic pistons, and steel hydraulic roller camshaft. Thanks to a set of the GM Performance Parts Fast Burn cylinder heads, that same short block breathes deeper and more efficiently than ever. These heads have the exclusive Fast Burn combustion chamber design to maximize the efficiency of burning the air/fuel mixture - resulting in an impressive increase in power.

The Fast Burn 385 Turn-Key is delivered to you with an aluminum dual-plane intake manifold, HEI distributor, cast iron water pump, damper, and flexplate. It also includes an accessory drive package, fuel pump, chrome air cleaner kit, Holley 770-cfm carburetor, starter, and spark plug wires. That’s a lot of horsepower in one box - we hope you can handle it!

Fast Burn 385 Tech Specs:
Part Number: 12499710
Engine type: Chevy small-block V8
Displacement (cu in): 350
Bore x stroke (in): 4.00 x 3.48
Block (P/N 10105123): Cast iron with 4-bolt main caps
Crankshaft (P/N 12556307): Forged steel
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 10159436): Hypereutectic aluminum
Camshaft type (P/N 10185071): Hydraulic roller
Camshaft lift (in): .474 intake/.510 exhaust
Camshaft duration (@.050 in): 208° intake/221° exhaust
Cylinder heads (P/N 12464298): Fast Burn aluminum; 62cc chambers
Valve size (in): 2.00 intake/1.55 exhaust
Compression ratio: 9.6:1
Rocker arms (P/N 10089648): Stamped steel
Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Ignition timing: Base 10° BTDC, 32° Total
Maximum recommended rpm: 5800
Balanced: External

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