PQY Adjustable EFI Fuel Pressure Regulator Kit 3–70 PSI, Billet Aluminum, Braided 6AN Lines

Compact adjustable EFI fuel pressure regulator kit for return-style systems, tunable from 3 to 70 PSI with AN fittings and braided lines. This PQY kit supplies an all-in-one solution for modern EFI engines that need a tunable, return-style fuel pressure regulator. Built from CNC-machined 6061-T651 billet aluminum, it comes preassembled with a gauge, multiple springs for different pressure ranges, braided stainless lines, and AN fittings to simplify installation and tuning on gasoline and E85-capable systems.

How does this regulator let me change fuel pressure across different fuels?

The regulator uses interchangeable springs and an adjustable top bolt to set the diaphragm tension, so you can tune target pressure precisely for gasoline, E85 or alcohol blends. The factory-installed spring covers mid-range pressures while two additional springs expand the control window.

• Preinstalled spring covers 20–45 PSI for common EFI setups.
• Included 3–20 PSI and 45–70 PSI springs swap in quickly for low or high-pressure needs.
• Top adjustment screw fine-tunes pressure without removing the regulator.

What fittings and ports are included for plumbing my return-style system?

PQY designed this unit with multiple ORB ports and AN fittings so it fits into most aftermarket fuel plumbing arrangements. The kit bundles braided AN lines and the appropriate adapters to connect feed and return lines with minimal extra parts.

• Two ORB6 ports accept AN8 feed lines (6AN to ORB adapters included).
• One ORB6 port serves as the AN6 return connection.
• 0–160 PSI gauge and 7 AN6 fittings included for fast setup and verification.

Will this regulator work with my EFI system and E85?

Yes — the materials and construction are compatible with ethanol blends and standard gasoline; the braided stainless lines and billet body resist fuel corrosion and pressure cycling. It functions as a universal replacement for most return-style regulators but always confirm thread and fitting compatibility with your setup.

• Compatible with gasoline, E85, and alcohol blends when properly plumbed.
• Billet aluminum body and stainless braided lines resist degradation from ethanol fuels.
• Vacuum/boost reference port supports boost-referenced fuel pressure control.

How easy is installation and pressure verification?

The kit includes the regulator, braided 6AN lines, a 0–160 PSI gauge and assorted fittings so you can install and test pressure without sourcing extra parts. The gauge screws into the 1/8" NPT port and the top bolt allows on-vehicle adjustment for fast tuning during dyno or road testing.

• 0–160 PSI gauge mounts to the regulator's 1/8" NPT port for instant readings.
• All necessary AN fittings and hoses are included to reduce additional purchases.
• Top-mounted adjustment screw permits pressure changes while installed.

Who this is for: Engine builders, tuners and DIY performance enthusiasts who run return-style EFI systems and need a robust, tunable regulator that handles gasoline and ethanol blends. It's ideal for street/track vehicles that require precise fuel pressure control, those upgrading to return-style plumbing, or anyone replacing an aging regulator with an all-inclusive kit ready for installation and tuning.

FAQ

Q: Can this regulator handle E85 fuel?

A: Yes. The billet aluminum body and stainless braided lines are compatible with E85 and ethanol blends when properly installed.

Q: What pressure ranges can I set with this kit?

A: With included springs and adjustment, you can set ranges of 3–20 PSI, 20–45 PSI, or 45–70 PSI as needed.