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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC842.030
ICON Premium Forged Big Block Chrysler 440 "RB" 505ci Pistons Step Dish Top 4.350" Bore
$74059
Ships on 09/15/2026
Lowest Price GuaranteeChrysler "RB" 505ciStep Dish Top Pistons Use w/ 7.100" Connecting Rods & 4.250" Crank Stroke
Big Block Chrysler "RB" 505ci Forged PistonsStep Dish Top 4.350" Bore (+.030'') 7.100" Connecting Rod 4.250" Crank Stroke Comp. Ratio: 10.3:1 / 75cc; 10.0:1 / 78cc; 9.3:1 / 88cc 8/pkg.
Technical Notes:
- For use with 440 "RB" blocks
- Stock standard 440 cylinder bore is 4.320" with 3.750" crankshaft stroke
- 4.350" Bore + 4.250 Stroke = 505ci
Technical Specs:
- Alloy: Premium High Ductility 2618
- Bore: 4.350"
- Crankshaft Stroke: 4.250"
- Connecting Rod Length: 7.100"
- Deck Height: 10.725" (RB)
- Compression Height: 1.485'
- Pin Size: 0.9900' x 2.750"
- Pin Location: Centered
- Flat Top: 2 Valve Reliefs
- Effective Head Volume: 26.7cc
- Intake Valve Relief: 0.215" Depth / 2.300" Diameter
- Exhaust Valve Relief: 0.194" Depth / 1.880" Diameter
- Top Landing Height: 0.320"
- Ring Grooves: 1/16" Top; 1/16" Middle; 3/16" Bottom
- Gram Weight: 592/141
- Compression Ratio: 10.3:1 w/75cc Heads; 10.0:1 w/78cc Heads; 9.3:1 w/88cc
Part TypePiston
BrandUNITED ENGINE MACHINE
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIC842.030
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
