JE Pistons are machined by the most advanced CNC machining technologies available. JE forged Pistons are trusted by racers and engine builds for dependability. JE Pistons Ultra Light GP, this JE piston set has undergone engineering changes to handle higher horsepower 4-barrel applications (approximately 650 hp) and angle milled heads. Both 350 and 400 series accept oversize valves (intake pocket is 2.255? and the exhaust pocket is 1.870?) and long duration, tight lobe separation cams. The ring grooves are precision machined for .043, .043, 3mm back cut rings with lateral gas ports for superior ring seal.

Includes:

Pin #927-2500-15-51S (118g)

Double Spiro Locks #927-042-CS

Contact Reduction Grooves

Double Pin Oilers

Lateral Gas Ports

Compression Ratio:

58cc 11.7:1

64cc 10.9:1

76cc 9.6:1