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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC788.030-1
Chevy 489ci Forged Piston Hollow Dome Top .210"
$21114
Ships on 09/09/2026
Lowest Price GuaranteeChevy 489ciDome Top Pistons Use w/6.135'' Connecting Rods
- Chevy 489ci Forged Piston
- Hollow Dome Top .210''
- 4.280'' Bore (+.030'')
- Use w/6.135'' Connecting Rod & 4.250'' Crank Stroke
- Comp. Ratio: 12.7/96.5cc; 10.6/108cc; 10.2/119cc
- 1/pkg
Technical Specs: - Alloy: Premium High Ductility 2618
- Bore: 4.280'
- Crankshaft Stroke: 4.250'
- Connecting Rod Length: 6.135'
- Deck Height: 9.800'
- Compression Height: 1.520'
- Pin Size: 0.990' x 2.750'
- Pin Location: Centered
- Hollow Dome Top: .210' 20cc 1 Valve Relief (Closed Chamber Head)
- Intake Valve Relief: 0.286' Depth / 2.300' Diameter
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.350'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 627/141
- Compression Ratio: 12.7:1 w/96.5cc Heads; 10.6:1 w/108cc Heads; 10.2:1 w/119cc
- Designed for O.E. and Edelbrock style cylinder heads.
Part TypePiston
BrandUNITED ENGINE MACHINE
Package Height5.1
Package Width5.1
Package Length5.3
Weight1.79 PG
Part CategoryPerformance Parts
Vendor Part NumberSIC788.030
Package Qty1
Package TypeEA
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