Product Summary

331, 365, 390, Aluminum

  • Classic finned aluminum valve covers for '49-'60 Cadillac

Key Specs

MFG. Part #1037
Material TypeAluminum

Need To Know

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Offenhauser 1037 Details

Classic finned aluminum Offy design adds some flash to your Cadillac. Fully polished, rugged cast aluminum design provides a better seal while reducing noise and dissipating heat versus stock valve covers.

Fits 1949-1962 Cadillac 331, 365, and 390 V-8 engines.


  • Height inside at center is 3"
  • Height inside at bolt holes is 2-3/4"
  • Ends round off at approximately a 3" radius
  • Inside dimensions at gasket area are 19-11/16" x 4-5/16"
  • Outside dimensions at gasket area are 20-1/2" x 5-1/16"
  • Bolt hole spacing is 10-1/16" x 4-13/16" center to center

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.

Offenhauser 1037 Specifications

MFG. Part #1037
Material TypeAluminum
Sold in QuantityPair