JE LS2 Ultra Asymmetrical FSR Dish Top Forged Piston (J361729)

J361729 - LS2 4.005" PISTONS -12.5cc DIS

4.005" bore, 4.000" stroke, 6.125" rod length, -12.5cc dome volume

Part Number: J361729

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:
Pin #927-2250-15-51C (106g)
Round Wire Locks # 927-073-MW

Features:

Accumulator Grooves
Double Pin Oilers
Offset Wrist Pin

Piston Specifications

Make: CHEVROLET

Engine: CHEVROLET LS GEN III/IV
Bore Diameter: 4.005
Compression Height: 1.115
Compression Ratio with 64cc chamber volume: 10.4
Compression Ratio with 68cc chamber volume: 10.0
Compression Ratio with 70cc chamber volume: 9.8
Piston Volume: -12.5
Cylinder Head: LS 12 DEG/15 DEG COMBO VR
Piston Pin Outside Diameter: 0.927
Piston Pin Length: 2.250
Piston Pin Material: 9310
Ringset Included: No
Top Compression Ring Thickness: 0.0475
Second Compression Ring Thickness: 0.06
Oil Ring Thickness: 0.149
Piston Material: 2618
Forging Type: FSR
Piston Avg Weight: N/A

Pin Wall Thickness: 0.200
Piston Type: Dish