JE PISTONS LS Asymmetrical FSR Flat Top Pistons [CID 413 | BORE 4.000 | STROKE 4.100 | ROD LGTH. 6.125 | BLOCK HT. 9.240 | COMP. HT. 1.065 | 64CC 11.8 | 68CC 11.3 | 70CC 11.1 | DOME VOL. -5 | OVERSIZE STD LS2] (GM LS1, LS6 & LS2)

GM LS Flat Top Our brand new Asymmetrical FSR (Forged Side Relief) forging design allows for the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearance problems. Asymmetrical forging design maintains a larger skirt on the heavily stressed major thrust side, while reducing friction with a smaller skirt on the minor thrust side. The result is a high strength, lightweight piston that significantly reduces friction in your engine. Lightweight and extremely durable, these pistons are machined for 1.2mm, 1.5mm, 3.0mm rings.

Combination 12° & 15° Valve Pockets

Features:
Accumulator Grooves
Double Pin Oilers
Offset Wrist Pin
Includes:
Pin #945-2250-15-51C (105g) For use with 6.098” Rod Length
Pin #927-2250-15-51C (106g) For use with 6.125” Rod Length
Round Wire Locks # 927-073-MW

Oil Rail Support is Included
Made To Order