These JE Pistons feature a newer dome profile to match a wider variety of 18º heads. Designed to fit your high-compression, high horsepower 17º/18º dirt late model engine, JE pistons have smooth flowing domes for optimum flame travel and angle milled head compatibility. New valve reliefs will accommodate larger valves and long duration, tight lobe separation cams. JE pistons utilize dedicated left and right hand forgings and accept 1/16, 1/16, 3/16 rings. Will not fit Brodix 18x cylinder heads.

Includes:

Pin #927-2750-15-51S (130g)

Contact reduction grooves

Double pin oilers

Heavy Duty single .073 spiro lock (#927-073-AS)

Compression Ratio:

52cc 16.1:1

55cc 15.4:1

58cc 14.7:1