Grooves are machined around the top ring lands to reduce detonation and improve the sealing power of the top ring. Designed for Stock stroke flywheels only. All wrist pin holes are ream fit for a perfect geometrical surface.
Enlarged valve pockets provide the clearance for larger valves and high lift cams but must be checked. Includes Instructions and clearance recommendations. All Piston Kits include Cometic brand gasket sets.
Standard Bore Size, 9:1 compression ratio. Fits Twin Cam 1999/Later 1550cc (95ci).