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Lunati
SKU : EA036-383

LS1 383 Rotating Assembly, 3.903" Bore, +5cc Dome Pistons

$3,882.82
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LS1 383 Rotating Assembly, 3.903" Bore, +5cc Dome Pistons,12.5:1 Compression ratio

  • Lunati LS1 383 Rotating Assembly
  • 3.903" Bore
  • +5cc Dome Pistons
  • 4.000" Stroke
  • 6.125" Rod Length
  • 12.5:1 compression ratio


  • LS1 / LS6 Stroker Engine Assemblies

    Lunati is the leader in LS1 and LS6 rotating assemblies, offering 14 kits that are readily available! Lunati was the first on the market with the LS series when the first C5 rolled off the assembly line. The Lunati engine assemblies are made with the finest Lunati engine components, including a Lunati Pro-Series crankshaft, Lunati Pro-Billet connecting rods, Lunati forged pistons, rings, bearings, and piston pins. For applications where pump gasoline is used, we have found that a static 10.6 CR is the limit to stay out of detonation.

    If a turbo or blower is to be used, we recommend 8.5 CR with pump gas. For racing and race fuel you can move to 12.5 CR for maximum performance. The pistons and rings come in 0.005" oversize to accommodate honing to clean up the cylinders. The top ring is a 1.5 mm moly plasma pre gapped ring, second ring is 1.5 mm cast-iron reverse-twist, and the oil ring is 3 mm three-piece. The assembly is internally balanced and the reluctor ring is installed. All this, and with your choice of up to 408 cubic inches! It doesn't get any better.
    Vehicle Application(s)

    This product fits the following models and years

    ModelYear(s)
    Pontiac GTO2004 2005 2006
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