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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC718.030
Chevy 383ci Forged Pistons Flat Top
$70014
Ships on 09/08/2026
Lowest Price GuaranteeChevy 383ciFlat Top Pistons Use w/6.000'' Connecting Rods Use with Chevy 350ci Block and 400ci Crankshaft
Chevy 383ci Forged PistonsFlat Top 4.030'' Bore (+.030'') Use w/6.000'' Connecting Rod & 3.750'' Crank Stroke Comp. Ratio: 12.0/58cc; 11.1/64cc; 9.8/76cc 8/pkg
Technical Specs:
- Alloy: Premium High Ductility 2618
- Bore: 4.030'
- Crankshaft Stroke: 3.750'
- Connecting Rod Length: 6.000'
- Deck Height: 9.025'
- Compression Height: 1.133'
- Pin Size: 0.927' x 2.750'
- Pin Location: Centered
- Flat Top: -4.9cc 2 Symmetrical Valve Reliefs
- Intake Valve Relief: 0.264' Depth / 2.200' Diameter
- Exhaust Valve Relief: 0.264' Depth / 1.880' Diameter
- Top Landing Height: 0.222'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 410/132
- Compression Ratio: 12.0:1 w/58cc Heads; 11.1:1 w/64cc Heads; 9.8:1 w/76cc
- Use with 350ci block and 400ci crankshaft. This is a stroked 350ci chevy combination.
United Engine and Machine Company is proud to introduce our new 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
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- Dual forced pin oiling on most applications
- 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 Small Block Chevy Pistons
BrandUNITED ENGINE MACHINE
Package Height3.8
Package Width9.3
Package Length18.3
Weight10.66 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIC718.030
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
