The ZZ383 is designed to give you big-block-style power from a small-block engine. If you're looking for a small-block Chevy that makes big-block power, this is the engine for you. For the "ultimate" GM Performance Parts small-block crate engine, choose the ZZ383-a combination of Fast Burn aluminum performance heads and a 383-c.i.d. stroker small-block that can add up to 425 horsepower and 449 lb.-ft. of torque. According to GM, this engine was carefully engineered with a balance of torque-producing bottom-end power and horsepower-inducing Fast Burn cylinder heads to combine for the ZZ383/425's stellar performance statistics. The Fast Burn heads have large 2.00/1.55-inch valves and specially designed chambers that draw in lots of air and fuel, burning the mixture quickly and completely. It's a combination that generates great mid- and high-rpm power, which, when combined with the 383 displacement, creates a strong all-around performer. The ZZ383 has a specially modified engine block and 3.80-inch stroke crankshaft, which produce 383 cubic inches of performance. The reciprocating assembly is comprised of heavy-duty components including a 4340 induction-hardened forged crankshaft, and unique, heavy-duty powdered metal rods. If you've never driven a car with a stroked small-block and the top end components to support it, now's your chance. MSRP is $5,649.