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Pontiac 400ci Hypereutectic Piston D-Cup Dish 17cc +040
InfoVehicle Info Needed
UNITED ENGINE MACHINEPART NUMBER: 648-KB346.040-1

Pontiac 400ci Hypereutectic Piston D-Cup Dish 17cc +040

$12041
ShippingShips on 09/09/2026
Lowest PriceLowest Price Guarantee

Pontiac 400ci
  • Step Dish
      • Pontiac 400ci Hypereutectic Piston
    • D-Cup Dish -17cc
    • 4.160" Bore (+.040")
    • Use w/6.630'' Connecting Rod & 3.750'' Crank Stroke
    • Comp. Ratio: 9.6:1/71cc; 8.4:1/87cc; 7.8:1/96cc; 7.1:1/111cc
    • 1/pkg

      Note: Designed to work with 1967 and later 14-degree and 20-degree heads. Piston is .025" below a 10.250" deck. Check small end of rod to piston before assembly / .045" clearance per side minimum.

      Technical Specs:
    • Alloy: Hypereutectic 390 Alloy
    • Bore: 4.160'
    • Crankshaft Stroke: 3.750'
    • Connecting Rod Length: 6.630'
    • Deck Height: 10.250'
    • Compression Height: 1.710'
    • Pin Size: 0.980' x 3.000'
    • Pin Location: Centered
    • D-Cup Dish Top: -17.0cc 2 Valve Reliefs
    • Intake Valve Relief: 0.248" Depth / 2.210" Diameter
    • Exhaust Valve Relief: 0.248" Depth / 2.210" Diameter
    • Top Landing Height: 0.300'
    • Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
    • Gram Weight: 557/163
    • Compression Ratio: 9.6:1 w/71cc Combustion Chamber Heads; 8.4:1 w/87cc Combustion Chamber Heads; 7.8:1 w/96cc Combustion Chamber Heads; 7.1:1 w/111cc Combustion Chamber Heads
    Part TypePiston
    BrandUNITED ENGINE MACHINE
    Package Height5.05
    Package Width5.25
    Package Length5.3
    Weight1.81 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part NumberSKB346.040
    Package Qty1
    Package TypeEA
    No Questions
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    Some parts are not legal for use in California or other states with similar laws / regulations
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