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Offenhauser 1939-53 Flathead Ford 4-Ring Pistons, 4.00 Stroke, 3.248 Bore

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Specs
Sold in Quantity:
Set
Piston Diameter:
3.248
Stroke:
4.00
Piston Style:
Flat Top
Piston Material:
Cast Aluminum
Garage Sale:
No

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Please NOTE the following about this product:

  • This item is sold as a set.

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What's in the Box

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 .060" oversize. Sold in sets of eight.

Item Details

3.248" bore, 4.00" stroke

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1939-53 Flathead Ford V8 4-Ring Pistons, 4 Inch Stroke, .060 Over
                        

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

Sizing based on original 3.188" bore. Fits .060" overbore size and 4" stroke crank. Sold as a set of 8.

Arias Forged Flathead Ford Pistons, 4.00 Stroke
                        

If you are going to spend the time and money to build the flathead of your dreams, you just as well spring for Arias forged pistons. Arias forgings work great with nitrous and up to 10 psi on blown engines. They come as a set of eight and include wrist pins, locks and piston rings. They are a three ring design and work with the stock 7" rod length. Stock flathead bore size was 3.188"

Each piston set includes:

  • (8) Forged Aluminum Pistons
  • (8) Wrist Pins w/ Locks
  • (8) Cast Ring Sets
Garage Sale - Hypermax 3 Ring Pistons For Flathead, 3.24 X 4.00
                        These hypereutectic pistons and rings give your flathead the most modern, low-drag combination ever offered for a flathead. 

This is the same piston design used in new cars and uses the T4 heat treating process that has unparalleled low drag and wear. Standard bore is 3.188".

Style F piston rings are installed.

This item is garage sale priced because they appear to have been installed.  They do include piston rings installed on the pistons.  One of the pistons has some mild imperfections on the bottom.  These do not appear to have been run.

NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

Rings for Offenhauser 4-Ring Flathead Ford Pistons, 3.248 bore
                        

The original bore size was 3.188", which makes these .060" oversize.

Flathead Ford 4 Ring Set, 3.188 Bore, +.060 Oversize
                        

Fits 3.188" bore Speedway Custom 4 Ring Pistons for Flathead V8.  Set of 8.  Cast Iron top and 2nd groove rings.

+.060" oversize.  Oversizes based off original 3.188" bore size.

Ford Flathead V8 Builders Handbook
                        This book covers every facet of your Flathead Ford V-8. Rebuilding? Get one of these books! 200 images. 154 pages.