BIG-BLOCK CYLINDER HEADS

Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. These cylinder heads meet GM’s stringent quality standards and provide excellent service and durability not found in used cylinder heads. The cylinder heads have rectangular intake ports, which are larger in volume and designed to enhance high-rpm horsepower. They are an ideal street head for those Big-Block enthusiasts who want more power from a street car that sees a lot of drag-strip action.

Chevrolet Performance Bowtie high-performance street cylinder heads are an ideal combination of street drivability and drag-strip performance. They provide a broad power range with ample low-end torque, excellent throttle response, good mid-range torque and enough top-end power to beat your competitors to the finish line.

The high-rpm airflow requirements of Pro Stock engines influenced the design of Chevrolet Performance’s RS-X spread-port Big-Block cylinder head design, which is used on the ZZ632 Deluxe crate engine. It uses a raised, symmetrical port design for greater port-flow equalization. The heads are designed for large-displacement high-performance applications, where high-rpm airflow is a must for maximum performance. They’re used with a shaft-style roller rocker system. Assembled heads feature 2,450/1.800-inch titanium valves and beehive-type springs.

Monster-cubic-inch stroker Big-Blocks need lots of air to maximize their performance potential and Chevrolet Performance Bowtie race cylinder heads are designed for that task. They are made of 356-T6 aluminum with huge, raised intake ports, larger valves, smaller combustion chambers and two additional head bolts for increased clamping force.

Chevrolet Performance DRCE (Drag Racing Competition Engine) Pro Stock cylinder heads are the choice of professional drag racing champions. When races are won by thousandths of a second, there’s no room for second-best parts.