P1581(6).75 Dish Top Piston for 1988-1992 Buick, Oldsmobile, Pontiac 3.8L [0.75 mm Undersize]
InfoVehicle Info Needed
ENGINETECHPART NUMBER: 416-P1581(6).75

P1581(6).75 Dish Top Piston for 1988-1992 Buick, Oldsmobile, Pontiac 3.8L [0.75 mm Undersize]

$43799
ShippingShips on 11/18/2026
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GM
Piston
  • 1988-1992 Buick, Oldsmobile, Pontiac 3.8L
  • Dish Top Piston
  • Size: 0.75 mm Undersize
  • Set of 6

    The Enginetech P1581(6).75 is a replacement piston for GM/Buick, 3.8L 231 engines, sized at 0.75 mm Undersize. Engineered to OE specifications for reliable combustion chamber performance.

    Enginetech P1581(6).75 Piston Features:

    • Fitment: GM/Buick, 3.8L 231
    • Size: 0.75 mm Undersize
    • Turbocharged or supercharged application
    • Engineered to OE specifications for direct replacement
    • Note: Dish top. 1.366 CH. Ex. S/C. Hyper. Use M96136 rings.
    • Precision-Engineered Pistons for Reliable Engine Performance

      Enginetech Piston Sets are engineered to deliver consistent performance, durability, and OE-level fitment for engine rebuild and repair applications, backed by Enginetech’s reputation as a trusted supplier to professional engine builders. Manufactured using advanced materials and precision machining processes, these piston sets are designed to maintain proper clearances, balance, and combustion efficiency across a wide range of domestic and import engines. Enginetech offers cast aluminum, hypereutectic, and forged piston options to meet varying performance and durability requirements, ensuring compatibility with both stock and performance builds. With a focus on weight-matched sets, dimensional accuracy, and long-term reliability, Enginetech piston sets provide a dependable foundation for restoring engine integrity, improving efficiency, and supporting consistent operation under demanding conditions.

    Part TypePiston
    Product LineEnginetech Piston Sets
    BrandENGINETECH
    Package Height3.75
    Package Width9.25
    Package Length13.75
    Weight7.75 PG
    Part CategoryReplacement Parts
    Compression Height1.366
    Size0.75 mm Undersize
    QuantitySet of 6
    Oil Ring Thickness3.00
    RemanufacturedNo
    Bore Diameter3.799
    Piston StyleDish
    Piston Pin Outside Diameter0.9054
    Second Compression Ring Thickness1.50
    Top Compression Ring Thickness1.50
    Piston MaterialCast aluminum
    FitmentGM/Buick
    Part FitmentDirect Fit
    Engine Displacement3.8L 231
    Vendor Part NumberP1581(6).75
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning