JE Pistons are machined by the most advanced CNC machining technologies available. JE forged Pistons are trusted by racers and engine builds for dependability. The JE FSR Tour Series GP is a lightweight piston design specifically made for naturally aspirated circle track or drag race applications up to 650 HP. Ring package has been raised for maximum efficiency. These pistons are an aggressive, competition-only design. Not intended for street or nitrous use. Ring grooves are precision machined for .043, .043, 3.0mm rings. Valve reliefs will accommodate angle-milled aftermarket cylinder heads.

Includes:

Pin# 927-2350-15-51C (111g)

Wire Locks 927-073-MW

Lateral Gas Ports

Accumulator Groove

Double Pin Oilers

Compression Ratio:

58cc 11.2:1

64cc 10.4:1

72cc 9.5:1