Product Summary

Universal Fit, 7-14 Fuel Pressure Rating (psi)

  • Ideal bypass for use with a positive-displacement fuel pump (typically not required for diaphragm-type pumps)
  • Adjustable diaphragm lets you set fuel pressure
  • Also uses a Holley jet inside
  • Due to fuel pump variations, the jet is not included

Key Specs

MFG. Part #91011579
BrandSpeedway Motors

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Speedway Motors 91011579 Details

This pressure relief valve is the ideal bypass valve for use with a positive displacement fuel pump (typically not required for diaphragm type pumps). For use with any carbureted race engine using a belt drive fuel pump. This bypass valve is well suited for alcohol carburetors with gear type pumps.

Adjustable diaphragm lets you set fuel pressure while the Holley jet inside allows you to reduce idle fuel pressure without affecting operating pressure. Due to fuel pump variations, the jet is not included. The fuel pump relief valve features a stainless steel seat and bronze popitt valve for maximum resistance to corrosion.

  • Easily mounts directly to the carb fuel log
  • Adjusting screw on top sets high RPM fuel pressure
  • Easy pressure adjustments at 7-14 PSI
  • Adjustable to vastly different fuel pumps
  • Maximum fuel availability at the carb
  • 3/8" NPT ports


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 91011579 Specifications

MFG. Part #91011579
BrandSpeedway Motors
Fuel Pressure Rating (psi)7-14