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

J361729

61729

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