Our engineers grafted the bottom end of the legendary ZZ4 with the horsepower-building Fast Burn cylinder heads to create the Fast Burn 385. The result is 385 horsepower and a satisfying 385 lb-ft of torque — with no less than 300 lb-ft from 1500 rpm to 5700 rpm.
The foundation is a sturdy iron block with four-bolt mains, a forged steel crankshaft, an aggressive hydraulic roller camshaft, and durable high-silicon pistons. As a Turn-Key crate engine, it comes with the distributor, carburetor, and balancer installed — along with a starter, fuel pump, air conditioning pump, alternator, front-end accessory drive kit, and more — all in one convenient, all-inclusive package!
The lightweight, Vortec-style Fast Burn aluminum heads have large, 210-cc intake runners and 2.00-inch/1.55-inch valves. Their 62-cc combustion chambers are uniquely shaped to promote quicker, more complete combustion.
If you want to finish off the engine yourself, try the Fast Burn 385 Base engine (P/N 12496769) at a lower price. It includes only the intake manifold, distributor, water pump, damper, and flexplate.
Chevy Small-Block V-8
Displacement (cu. in.):
Bore x Stroke (in.):
4.000 x 3.480
Block (P/N 10105123):
Cast-iron with four-bolt main caps
Crankshaft (P/N 12556307):
Connecting Rods (P/N 10108688):
Powdered metal steel
Pistons (P/N 10159436):
Camshaft Type (P/N 10185071):
Camshaft Lift (in.):
.474 intake / .510 exhaust
Camshaft Duration (@.050 in.):
208° intake / 221° exhaust
Cylinder Heads (P/N 12464298):
Fast Burn aluminum; 62-cc chambers
Valve Size (in.):
2.000 intake / 1.550 exhaust
Rocker Arms (P/N 10089648):
Rocker Arm Ratio:
Base 10° BTDC, 32° Total
Maximum Recommended rpm:
Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.
* The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges. Click here to see the 2015 City Express destination freight charge.
***The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Includes destination freight charge and gas guzzler tax.
Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.
To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.