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

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#91015902

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

  • Features the original 4-ring design
  • Comes with snap ring style retainer clips
  • Includes precision ground cam and modern steel wrist pins
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$219.99

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Product Summary

Flat Top Piston Style, Cast Aluminum Piston Material

  • Features the original 4-ring design
  • Comes with snap ring style retainer clips
  • Includes precision ground cam and modern steel wrist pins
  • Specifically designed for the 1939-1953 Ford Flathead V8 engine
  • The pressure cast aluminum construction provides great strength and durability
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Key Specs

MFG. Part #91015902
BrandSpeedway Motors
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
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Speedway Motors 91015902 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 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.

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

Speedway Motors 91015902 Specifications

KEY SPECS
MFG. Part #91015902
BrandSpeedway Motors
Piston StyleFlat Top
Piston MaterialCast Aluminum
Wrist Pin IncludedYes
GENERAL
Piston Diameter3.248"
Stroke4.000"
Piston Weight361 grams
NotesCompression height is 1.654"
Sold in QuantitySet

Ratings & Reviews

5

2 Reviews

Overall Assessment

Customers praise the product for its outstanding quality and competitive price. The product's functionality and practicality have been highlighted, with users stating it fits perfectly for performance flathead builds. Users appreciate the high material quality and recommended it, confirming they would purchase it again. There's noticeable customer satisfaction, with the product clearly distinguishing itself from competitors in terms of quality and value.

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5

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Great quality,,,,Great price

5.0

4 years ago

Tommy

Middle , Tennessee

Verified

These will work really well in my performance flathead build,,,just what was looking for .

Would Recommend

I would buy again

5.0

6 years ago

Matt

Peralta, NM

Verified

Happy with quality

Would Recommend

Showing 2 of 2 reviews

Questions & Answers

1 Question • 1 Answer

What is the compression height of this piston? Do you offer a ring package with these?

by machinist

• 12 years ago

1 answer

View Answer

1 of 1 questions shown

Fitment

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

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