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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC828.055
ICON Premium Forged Big Block Chrysler 440 "RB" 511ci Pistons Flat Top 4.375" Bore
$75555
Ships on 09/14/2026
Lowest Price GuaranteeChrysler "RB" 505ciFlat Top Pistons Use w/ 7.100" Connecting Rods & 4.250" Crank Stroke
IBig Block Chrysler "RB" 511ci Forged PistonsFlat Top 4.375" Bore (+.055'') 7.100" Connecting Rod 4.250" Crank Stroke Comp. Ratio: 12.6:1 / 75cc; 12.2:1 / 78cc; 11.1:1 / 88cc 8/pkg.
Technical Notes:
- For use with 440 "RB" blocks
- Stock standard 440 cylinder bore is 4.320" with 3.750" crankshaft stroke
- 4.375" Bore + 4.250 Stroke = 511ci
Technical Specs:
- Alloy: Premium High Ductility 2618
- Bore: 4.375"
- 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: 4.5cc
- Intake Valve Relief: 0.215' Depth / 2.300' Diameter
- Exhaust Valve Relief: 0.199' Depth / 1.880' Diameter
- Top Landing Height: 0.260'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 577/141
- Compression Ratio: 12.6:1 w/75cc Heads; 12.2:1 w/78cc Heads; 11.1:1 w/88cc
Part TypePiston
BrandUNITED ENGINE MACHINE
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIC828.055
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
