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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC720.060
Ford 331ci Forged Pistons Flat Top 2V
$79342
Ships on 09/10/2026
Lowest Price GuaranteeFord 331ciFlat Top Pistons
Ford 331ci Forged Pistons Flat Top 2V 4.060'' Bore (+.060'') Use w/5.400'' Connecting Rod & 3.250'' Crank Stroke Comp. Ratio: 11.1/54cc; 10.5/58cc; 9.8/64cc 8/pkg
This piston is based and intended for use on the Windsor-based 302 Small Block Ford.
Technical Specs:
- Alloy: Premium High Ductility 2618
- Bore: 4.060'
- Crankshaft Stroke: 3.250'
- Connecting Rod Length: 5.400'
- Deck Height: 8.206'
- Compression Height: 1.170'
- Pin Size: 0.927' x 2.750'
- Pin Location: Centered
- Flat Top: +4.8cc 2 Valve Reliefs
- Intake Valve Relief: .266' Depth / 2.120' Diameter
- Exhaust Valve Relief: .254' Depth / 1.880' Diameter
- Top Landing Height: 0.220'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Compression Ratio: 11.0:1 w/54cc Heads; 10.5:1 w/58cc Heads; 9.8:1 w/64cc
Ford Small Block Windsor Based Pistons
United Engine and Machine Company is proud to introduce 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 Small Block Ford Pistons
BrandUNITED ENGINE MACHINE
Package Height5.0
Package Width13.0
Package Length19.1
Weight11.66 PG
Part CategoryPerformance Parts
Piston Ring Thickness (In.)1/16 x 1/16 x 3/16
Top Ring Thickness1/16 in.
QuantitySet of 8
Piston MaterialForged
Pin Diameter0.927 in (23.5 mm)
Oil Ring Thickness3/16 in.
Part FitmentSemi Universal
Second Ring Thickness1/16 in.
Piston StyleFlat top, with two valve reliefs
Bore4.06 in (103.124 mm)
Vendor Part NumberIC720.060
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
