Engine - Cylinder Heads - 18 degree Cylinder Heads

From GM Performance - this new family of aluminum cylinder heads for competition Chervrolet small-block 90 degree V6 engines offer a significant improvement over conventional Chevrolet designs. They feature an 18 degree valve angle vs. the older 23 degree angle design with 43cc chambers. They also feature relocated valve centerlines, shallow combustion chambers, centrally located spark plugs and high flow exhaust ports.