JE LS1 Extreme Duty FSR Flat Top Forged Piston (J321239)

J321239 - LS1 3.898" PISTONS -2cc DISH

3.898" bore, 3.622" stroke, 6.098" rod length, .945" Pin, -2.0cc dome volume

Part Number: J321239

we have redesigned and expanded our GM LS1 series product lines! These new pistons utilized our dedicated Forged Side Relief (FSR) forging that was specifically designed for high output GM LS1 series engines. In addition we have found ways to reduce weight and maintain the durability needed for both street and racing use. Lightweight and extremely durable, these pistons are machined for 1.5mm, 1.5mm, 3.0mm rings. wrist pin upgrade recommended above 800hp.
Includes:
.945 x 2.250 straight wall carbon steel wrist pin
Wire locks
Specifications
:
Part #: J321239
Bore: 3.898"
Oversize: STD
Stroke: 3.622
Rod Length: 6.098"
Compression Height: 1.340"
Compression Ratio with 64cc chamber volume: 10.4
Compression Ratio with 66cc chamber volume: 10.2
Compression Ratio with 72cc chamber volume: 9.6
Dome Volume: -2.0cc
Gram Weight: 437
Footnote: Forged Side Relief / Forced Induction
Reconmended Ring Set: J68008-3900-3