383 c.i., 4.030" bore, 3.750" stroke, 5.700" rod length, -5.0cc dome volume

SRP271055

P271055

Advanced, lightweight FSR forging that eliminates stress concentrations for superior strength. Stronger than traditional designs but up to 20% lighter. Accumulator grooves for improved ring seal Thick top ring lands to accommodate moderate forced induction/nitrous applications Rings Included Lightweight, low friction metric ring package included 1.2mm CARBON STEEL top ring, 1.5mm Napier 2nd ring, 3.0mm standard tension oil ring Minimal filing required Pins & Locks: High quality 2.250” pin further reduces reciprocating weight Carbon steel wire locks included Specifications: Engine: SMALL BLOCK CHEVROLET Bore Diameter: 4.030 Compression Height: 1.425 Compression Ratio with 58cc chamber volume: 11.9 Compression Ratio with 64cc chamber volume: 11.1 Compression Ratio with 70cc chamber volume: 10.3 Piston Volume: -5.0 Cylinder Head: CHEVROLET 23 DEG 20/30 Piston Pin Outside Diameter: 0.927 Piston Pin Length: 2.250 Piston Pin Material: 5115 Ringset Included: No Top Compression Ring Thickness: 1.2mm Second Compression Ring Thickness: 1.5mm Oil Ring Thickness: 3.0mm Piston Material: 2618 Forging Type: FSR Piston Avg Weight: 434 Pin Wall Thickness: 0.150 Piston Type: Flat Ring Set: JG31F8-4030-2