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Simple and cost effective return conversion. Our latest Cobra fuel module connects to the original feed line, then mounts our stainless valve F1i regulator on the OE fuel rails, and returns back to the fuel tank.

  • 700+ rwhp return conversion for gasoline only
  • Uses OE feed line and fuel rails
  • Built with high end components, upgradeable to 1200+ rwhp



     Walbro Fuel Pumps of your choice

  • F1i Fuel Pressure Regulator
  • 0-100 psi Fuel Pressure Gauge
  •  FC2 Controller with wiring
  • -10 Feed line
  • FlexLP / RH235 -8 Fuel line
  • Fuel Rail to Regulator Adapter
  • Fuel Hat to OEM Feed Line Adapter
  • Premium -8 return line (FlexLP) with compression style hose ends
  • All fittings, plugs and hose straps necessary to complete fuel line plumbing


LIMITATIONS OF THIS CONFIGURATION (see our other system if these conditions affect your application)

  • not E85 compatible
  • 320 lph pumps maximum, due to regulation accuracy limitations of the OE fuel rail
  • retained FRPS sensor will indicate regulator pressure, not actual ΔP across injector


  • 1999-2001 SVT Cobra
  • 2003-2004 SVT Cobra
  • 2003-2004 Mach1
  • 1999-2004 Mustang GT and V6

99-04 Mustang Cobra 4V L1 Fuel System (dual pump)

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