Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 4.00 Stroke/3.313 Bore
Flat Top Piston Style, Cast Aluminum Piston Material, 3.313" Piston Diameter, 4.000" Stroke
- Hypereutectic pistons-A332 aluminum and heat treated to a T-6 spec
- 5/64" first and second ring groove and the oil groove is 3/16"
- 3 5/16" bore and 3 3/4" stroke
- Rings sold separately
- .125" oversize
Original Flathead pistons used four rings, were somewhat round, had questionable wrist pins and locks and were made of cast iron. These pressure-cast aluminum pistons share the four-ring design, but are cam ground and use modern steel wrist pins and real snap rings. They’re a great upgrade when rebuilding your 1939-1953 flathead Ford or Mercury V8 engine.
- Original 4-ring design
- Pressure cast aluminum construction provides great strength and durability
- Precision cam ground
- Modern steel wrist pins
- Snap ring style retainer clips
The original bore size was 3.188", which makes these .125" oversize. Sold in sets of eight.
Item Details3.313" bore, 4.00" stroke
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
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