JE has redesigned and expanded their GM LS1 piston line. These new JE pistons utilize their dedicated Forged Side Relief (FSR) forging that was designed for high output engines. JE has found new ways to reduce weight yet maintain the durability needed for both street and racing applications. These pistons are machined for 1.5mm, 1.5mm, 3.0mm rings. A wrist pin upgrade is recommended for applications above 800hp.

Includes:

High strength FSR forging.

Accumulator grooves.

Double pin oilers.

Offset wrist pin.

.945 Pind diameter.

Pin 927-2250-15-51C – 106g or 945-2250-15C – 105g

Round wire locks 927-073-MW

Compression Ratio:

66cc 8.5:1