When building a dynamic fuel system one of the key elements is the fuel pressure regulator.  The A2040 Series Bypass Regulators By Weldon are our go to.  All  Weldon Regulators maintain steady fuel delivery during dramatic changes in fuel demand, such as WOT conditions, boost application and gear changes with precision pressure control.



  • .281″ bypass orifice
  • Fluorosilicone diaphragm
  • Flows over 6 GPM
  • 1/8″ NPT Gauge Port
  • 1/8″ NPT manifold pressure reference port
  • Fuel pressure increases on a 1:1 ratio with boost
  • Two -10 pressure ports / -8 return port
  • Billet Aircraft Aluminum with MIL-SPEC anodizing
  • Compatible with Gasoline, Methanol, Diesel, Ethanol, and most racing fuels

Available Models

  • A204-281-A-15 for carbureted street, and blow through application
  • A204-281-A-30 for carbureted race applications
  • A204-281-A-120 up to 110 PSI base
  • A204-281-A-200 ablve 110 PSI base



Interested in learning more about the Regulators? Reach out with the form below!