2-Port Regulator w/Boost Reference

The 2-Port Regulator w/Boost Reference from Magnafuel/Magnaflow Fuel Systems is engineered for high-performance fuel system builds where precise pressure control and engine load compensation are non-negotiable. This in-line regulator is purpose-built for enthusiasts running turbocharged, supercharged, or nitrous-equipped engines that demand dynamic fuel delivery across varying boost levels. Whether you're tuning a street machine, drag racer, or engine bay project, this regulator maintains consistent fuel pressure while automatically adjusting to match manifold boost—eliminating lean-out conditions during acceleration and ensuring optimal injector atomization.

Built from lightweight aluminum construction with a factory-proven blue and purple anodized finish, this dual-outlet regulator accepts 10 AN O-ring inlet and dual 8 AN O-ring outlet ports for maximum flow capacity and leak-free connections. The integrated 1/8-inch NPT port accommodates a vacuum or boost reference line, allowing the regulator to sense manifold pressure and proportionally increase fuel pressure at full boost—a critical feature for maintaining proper air-fuel ratio across the entire RPM and load range. With a base pressure range of 4 to 12 psi, this regulator suits carbureted applications and modern EFI systems alike, delivering compatibility with gasoline, E85, and methanol fuel blends without additional modifications or seals.

Mechanics and tuners installing high-flow fuel systems on modified engines will appreciate the straightforward in-line design that fits tight engine bays and custom fuel system layouts. The boost reference port is essential for anyone running forced induction, as it automatically increases fuel supply pressure in direct proportion to boost—preventing pressure drop across injectors and maintaining proper spray patterns under load. Installation requires routing the reference line to a clean manifold signal source, then dialing in base pressure at idle; from there, the regulator self-compensates, making it ideal for bolt-on turbo or supercharger upgrades and carburetor fuel injection conversions.