Product Summary

1.498" Inside Diameter, 1.6935" Outside Diameter, Steel

  • .060" oversize valve seats
  • Made of a specially hardened material to combat the effect of unleaded fuel and higher performance
  • Machine work required for installation

Key Specs

MFG. Part #91015313
BrandSpeedway Motors

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Speedway Motors 91015313 Details

The flathead Ford V8 was designed to run on fuel with high levels of lead, but even with leaded fuel, the stock valves will eventually hammer the seats out, which will close up the valve lash and leave your valves hanging open...that is if you don't seize a valve to the guides first!

Remember what year your engine was built and how fatigued the valve train components are. Henry may have built them right with the technology he had available then, but this is now and we have the modern components you need.

These 0.060 oversize valve seats are made of a specially hardened material to combat the effect of unleaded fuel and higher performance. Machine work is required for installation. Intake has a 30° seat and exhaust has a 45° seat.


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.

Speedway Motors 91015313 Specifications

MFG. Part #91015313
BrandSpeedway Motors
Speedway Motors Catalog Part #910-15313
Inside Diameter1.498"
Outside Diameter1.6935"
Overall Thickness.218"
Material TypeSteel
Sold in QuantityEach
NotesHas a 30 degree seat.