The Aluminum KRE heads feature heart shaped chambers and relocated spark plugs for improved swirl, good quench, and overall better combustion. These features together improve combustion at all loads and speeds making them not only an improvement on torque across the entire rpm band, but driveability and fuel economy as well. They are also compatible with D-port exhausts and also flow about as much as a good set of ported iron heads out of teh box.
