GM Performance Parts SB-Chevy SB2.2 NASCAR Race Cylinder Heads

Product images may differ from actual product appearance.

The SB2 NASCAR racing head was first designed to improve durability, simplify preparation procedures, and reduce the overall cost of building and maintaining a small-block racing engine. It has "mirror" design intake ports, and all eight ports are angled toward the center of the engine, making this a perfect choice for single four-barrel applications. Spark plug holes were moved toward the bore center for greater combustion efficiency. This head is designed for aftermarket shaft-mounted rocker arems, and valve spring pads are large enough to use 1.625" springs. The combustion chambers are 48cc, which allow a 12.1:1 compression ratio with flat-top pistons. The head is machined for standard 1/1" valve guides.