Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 3.75 Stroke/3.248 Bore
Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 3.75 Stroke/3.248 Bore
Offenhauser

|

#56042600

Offenhauser 39-53 Flathead Ford 4-Ring Pistons, 3.75 Stroke/3.248 Bore

  • Utilizes the original 4-ring design but incorporates modern manufacturing
  • .060" oversize
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Bore/Stroke:

3.248" Bore / 3.75" Stroke

3.313" Bore / 3.75" Stroke

$176.99

/set

In Stock


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Product Summary

Flat Top Piston Style, Cast Aluminum Piston Material

  • Utilizes the original 4-ring design but incorporates modern manufacturing
  • .060" oversize
See more details

Key Specs

MFG. Part #56042600
BrandOffenhauser
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
See more specs

Need To Know

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855.313.9176
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Offenhauser 56042600 Details

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 have modern steel wrist pins with real snap rings. They’re a great upgrade when rebuilding your 1939-1953 flathead Ford or Mercury V8 engine.

The original bore size was 3.188", which makes these .060" oversize. Sold in sets of eight.

  • 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

Item Details

3.248" bore, 3.75" stroke

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.
CA Prop 65
CARB warning

Offenhauser 56042600 Specifications

KEY SPECS
MFG. Part #56042600
BrandOffenhauser
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
GENERAL
Piston Diameter3.248"
Dome Height1.729"
Stroke3.750"
Piston Weight468 grams
Sold in QuantitySet

Ratings & Reviews

5

5 Reviews

Overall Assessment

Customers highly recommend this product, emphasizing its affordability, availability, fast delivery, and positive experience with the Speedway brand. Notably, it's great for vehicle restoration projects, endorsed by a user rebuilding a 1946 flathead vi in a 1933 Ford sedan. Reviewers also appreciate the product's accuracy and quality, expressing anticipation to install the pistons that measured well. The product is consistently deemed a fantastic deal, setting it as a top choice among potential buyers.

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5

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I would recommend this product.

5.0

3 years ago

Bryan S.

Washington State

Verified

This product was priced right, available and I received it quickly.

Would Recommend

As ordered

5.0

4 years ago

Flathead engine

Virginia

Verified

Received very quick

Would Recommend

I'm so glad that Speedway was recommended to me.

5.0

8 years ago

TDWarren2

Sao Paulo, Brazil

Verified

I'm rebuilding my 1946 flathead vi that is installed in a 1933 Ford sedan.

Woul buy again

5.0

10 years ago

tenniesgrandpa

altoona pa

Verified

Great deal, and fast!

Would Recommend

Specs are all "right on"

5.0

16 years ago

Pete's Rod Shop

Rochester, OH

I have not installed the pistons yet, but they all mic'ed nicely.

Would Recommend

Showing 5 of 5 reviews

Questions & Answers

4 Questions • 4 Answers

Do the piston come with pins and is the price for set of 4 or 8

by Jughead

• 10 years ago

1 answer

View Answer

wrist pins is it center of or shift ?

by henri

• 13 years ago

1 answer

View Answer

Are the pistons flat top or dome and how tall is the dome? And how much do the piston and wrist pin weigh?

by Fredric

• 13 years ago

1 answer

View Answer

what is the wall clearance that is recommended for these pistons?

by Mackman

• 15 years ago

1 answer

View Answer

4 of 4 questions shown

Fitment

  • 239 Ford Flathead V8

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Customer Impersonation Script