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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC779.040
Icon Big Block Chevy 454 ci Forged Pistons with 4.290 in. Bore (+.040 in.)
$78809
Ships on 09/17/2026
Lowest Price GuaranteeChevy 454ciDome Top Pistons Use w/6.135'' Connecting Rods
Icon Big Block Chevy 454 ci Forged Pistons4.290 in. Bore (+.040 in.) 6.135 in. Connecting Rod 4.000 in. Crank Stroke Hollow Dome Top .190 in. Comp. Ratio: 11.7/96.5 cc; 9.9/108 cc; 9.5/119 cc Set of 8
Technical Specs:
- Alloy: Premium High Ductility 2618
- Bore: 4.290 in.
- Crankshaft Stroke: 4.000 in.
- Connecting Rod Length: 6.135 in.
- Deck Height: 9.800 in.
- Compression Height: 1.645 in.
- Pin Size: 0.990 x 2.750 in.
- Pin Location: Centered
- Hollow Dome Top: .190 in. 18cc 1 Valve Relief (Closed Chamber Head)
- Intake Valve Relief: 0.286 in. Depth / 2.300 in. Diameter
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.365 in.
- Ring Grooves: 1/16 in. Top; 1/16 in. Middle; 3/16 in. Bottom
- Gram Weight: 648/141
- Compression Ratio: 11.7:1 w/96.5 cc Heads; 9.9:1 w/108 cc Heads; 9.5:1 w/119 cc
- Designed for O.E. and Edelbrock style cylinder heads
United Engine and Machine Company is proud to offer the Icon line of forged pistons. Icon brings the same quality and performance you've come to expect from other United Engine brands while adding a new lightweight forged design. No matter your high performance application, there is an Icon piston for you.
Features:
- High ductility 2618 alloy
- Perfect for Nitrous, Turbocharged and Supercharged Apps
- Dual forced pin oiling on most applications
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- Lateral gas porting on higher compression ratios
- Fully machined with deep valve pockets
- Second land accumulator grooves
- Top land mini groove technology
- Diamond finished skirts
- Triple wound spiral locks
- Spacer rings included in short compression heights that intersect the wrist pin bore
- Sold in Sets (except when noted as 1 piston per package)
Click here for reference guide to piston top designs
Part TypePiston
Product LineUEM Pistons Icon Premium Forged Series Big Block Chevy Pistons
BrandUNITED ENGINE MACHINE
Package Height5.1
Package Width9.5
Package Length19.0
Weight15.17 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIC779.040
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
