inc. GST

SKU: SRP271055

BRAND: SRP Pistons

350 Small Block Chevy - Flat Top Forged Piston
383 c.i., 4.030" bore, 3.750" stroke, 5.700" rod length, -5.0cc dome volume

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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


  • 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

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