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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-KB405.039
Oldsmobile 403ci Hypereutectic Pistons Dish Top
$50216
Ships on 09/09/2026
Lowest Price GuaranteeOldsmobile 403ciDish Top Pistons
- Oldsmobile 403ci Hypereutectic Pistons
- Dish Top
- 4.390'' Bore (+.039'')
- Use w/6.000'' Connecting Rod & 3.385'' Crank Stroke
- Comp. Ratio: 9.5/83cc; 8.5/96cc
- 8/pkg
Technical Specs: - Alloy: Hypereutectic 390
- Bore: 4.390'
- Crankshaft Stroke: 3.385'
- Connecting Rod Length: 6.000'
- Deck Height: 9.312'
- Compression Height: 1.615'
- Pin Size: 0.9805'
- Pin Location: Centered
- D-Cup Dish Top: -6cc 2 Valve Reliefs
- Intake Valve Relief: N/A
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.281'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 674/147
- Compression Ratio: 9.5:1 w/83cc Heads; 8.5:1 w/96cc Heads
Part TypePiston
BrandUNITED ENGINE MACHINE
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberKB405.039
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
