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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-KB284.100
Chevy 489ci Hypereutectic Pistons Flat Top
$50415
Ships on 09/08/2026
Lowest Price GuaranteeChevy 489ciFlat Top Pistons Use with Chevy 454 Block
- Chevy 489ci Hypereutectic Pistons
- Flat Top
- 4.350'' Bore (+.100'')
- Use w/6.385'' Connecting Rod & 4.250'' Crank Stroke
- Comp. Ratio: 10.2/96.5cc; 9.5/105cc; 9.3/108cc; 8.6/119cc
- 8/pkg
Technical Specs: - Alloy: Hypereutectic 390
- Bore: 4.350'
- Crankshaft Stroke: 4.250'
- Connecting Rod Length: 6.385'
- Deck Height: 9.800'
- Compression Height: 1.270'
- Pin Size: 0.990'
- Pin Location: Centered (Includes Spacer Ring)
- Flat Top: 3cc Head Volume
- Intake Valve Relief: 0.266' Depth / 2.310' Diameter
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.312'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 556/158
- Compression Ratio: 10.2:1 w/96.5cc Heads; 9.5:1 w/105cc Heads; 9.3:1 w/108cc; 8.6:1 w/119cc Heads
Part TypePiston
BrandUNITED ENGINE MACHINE
Part CategoryPerformance Parts
Vendor Part NumberKB284.100
Package Qty1
Package TypeEA
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