Aeromotive X1 Series EFI Fuel Pressure Regulator 35-75PSI 1:1 -8 In/Out 13303. Car Make: Universal Car Model: Universal Engine: Universal. P/N 13303 X1 EFI Standard Bypass Regulator EFI Bypass Regulator for Return Style Systems. Base fuel pressure adjustable from 35-75 PSI. 1:1 rising rate for forced induction engines. Gasoline, ethanol, alcohol and diesel compatible. 2 – ORB -08 inlet/outlet ports on the sides. 1 – ORB-08 return port on the bottom port. NPT Gauge Port with plug. NPT Boost Port with 5/32? Compatible with X1 High Flow EFI Conversion kit. Compatible with X1 Carb Conversion kit. Bypass with matching spring and poppet. Handles up to 150 GPH with AN-08 return line. Suitable for any Aeromotive Pump up to A1000. X1 Regulator Service/Conversion Kits: Include Seat, diaphragm/poppet assembly and spring. Please message us for a Return Authorization Number before sending anything back to avoid processing delays. Real Street Performance is unlike most “Race Shops”. We are a fully functioning wholesale and retail distribution warehouse in addition to a dyno-equipped tuning and engine building facility. Our sales center and order fulfillment center operates with state of the art, industry leading software that allows us to get you ALL of the parts you need for your build quickly and correctly the first time without the headaches or excuses. Sign up to our Newsletter.