Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-IC686.030
Ford Boss 302ci Forged Pistons
$80805
Ships on 09/25/2026
Lowest Price GuaranteeFord Boss 302ciDome Top Pistons
- Solid Dome Top 6cc
- 4.030'' Bore (+.030'')
- Use w/5.155'' Connecting Rod & 3.000'' Crank Stroke
- Comp. Ratio: 12.5/52cc; 11.0/60cc; 10.5/64cc
- 8/pkg
Designed for factory or clone Boss 302. This piston is based and intended for use on the Windsor-based Small Block Ford with Cleveland style heads.
Technical Specs: - Alloy: Premium Forged 4032
- Bore: 4.030'
- Crankshaft Stroke: 3.000'
- Connecting Rod Length: 5.155'
- Deck Height: 8.206'
- Compression Height: 1.540'
- Pin Size: 0.912' x 2.750'
- Pin Location: Centered
- Lock Rings: PRL99-3 Spiral Locks
- Dome Top: 6cc 1 Valve Relief
- Intake Valve Relief: .186' Depth / 2.360' Diameter
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.301'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Gram Weight: 519/131
- Compression Ratio: 12.5:1 w/52cc Heads; 11.0:1 w/60cc Heads; 10.5:1 w/64cc
Part TypePiston
BrandUNITED ENGINE MACHINE
Package Height4.9
Package Width9.5
Package Length18.9
Weight13.39 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberIC686.030
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
