Product Summary

1.88" Overall Diameter, 1.59" Overall Height, Steel

  • Will fit 1937-'48 Ford/Mercury flathead V8's
  • Opens at 180-degrees
  • OEM fitment
  • Two required for each engine
  • Steel construction
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Key Specs

MFG. Part #91015801-180
BrandSpeedway Motors
Temp. RangeOpens at 180 degrees.
Gasket(s) IncludedNo
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91015801-180 Details

Don't let that flattie boil over – keep it running cool with new thermostats from Speedway. These thermostats sit in the water outlets on the top of the head, with the hose coming down over the water outlets, holding the thermostats in place. Remember, every Flathead needs two of these!

  • OEM replacement
  • Two thermostats required for each engine
  • Opens @ 180° F
  • Fits 1937-1947 Ford/Mercury flathead V8s in cars & trucks

Learn more about the importance of the thermostat with cooling systems and how they work by reading our tech article. Cooling System Principles.

Speedway Motors 91015801-180 Specifications

KEY SPECS
MFG. Part #91015801-180
BrandSpeedway Motors
Temp. RangeOpens at 180 degrees.
Gasket(s) IncludedNo
GENERAL
Overall Diameter1.88"
Overall Height1.59"
Mounted Height1.00"
Material TypeSteel
Sold in QuantityEach

Ratings & Reviews

4.7

15 Reviews

Overall Assessment

Customers highly recommend the product for its perfect fit that doesn't creep in the hose. Its functionality and performance are consistently praised, with users appreciating its easy installation process. The product is also recognized for its great quality and adequate passageway size. Notably, it is praised for its ability to quickly regulate working pressure. The product distinguishes itself for its hard-to-find parts, offered at a competitive price, adding further appeal for potential buyers. Despite some initial uncertainties, customers found exactly what they needed in our product and consider its quality as the 'usual from Speedway'.

Questions & Answers

3 Questions • 3 Answers

The item title states for 37-48 while the detail description states 37-47. What is it? My engine is a 48, 59ab.

by Pothole

• 7 years ago

1 answer

Gasket Does this require a seal or gasket ?

by Tinpit

• 12 years ago

1 answer

Do you think this might fit a 1938 Pontiac 6 cylinder ? Thanks

by Bobby G.

• 15 years ago

1 answer

3 of 3 questions shown

Fitment

  • 221 Ford Flathead V8

  • Ford Flathead V8 17 Stud 221 18

  • Ford Flathead V8 21 Stud 221 40

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  • 239 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

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  • 221 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

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  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

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  • 221 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

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  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

Customer Impersonation Script