Introducing the SP63 PRO SERIES PISTON
•Hard anodized ring lands
•Aggressive bowl design
•2618 Piston materials
•Longer side skirts
•Oil squirter reliefs
•Low drag ring pak
•Valve pockets are design to accept 1+ MM valves
•Valve relief on Intake & exhaust side to accept large cams lifts
GRAFAL skirt coating reduces drag, scuffing, friction and cylinder bore wear; reduces piston noise.
Phosphate coating provides the grey appearance to the PRO SERIES PISTON. This dry lubricant coating (not to be confused with a thermal film coating) provides a lubricant film in the pin bores and ring grooves until the oiling system of the engine reaches operating pressure; particularly useful during the initial start-up or break-in of engines to protect against galling and microwelding. The piston crown is still machineable.