Sportsman Racing Products fill a void in the sportsman performance market by utilizing the vast knowledge that JE Pistons has acquired through their continuous research and development of unique materials, piston design and technologies. SRP pistons are manufactured exclusively from premium quality extruded aerospace 4032 & 2618 aluminum alloy bar stock. These materials provide a far superior product over cast aluminum bars. SRP domes require no de-burring or preparation and feature smooth flowing radii for excellent flame travel. Valve pockets machined to accept oversized valves.