40 - 75 PSI Aluminum Fuel Pressure Bypass Regulator - Red

• Adjustable 40–75 PSI return-style regulator built for EFI fuel systems

• 1:1 boost-reference vacuum port compensates fuel pressure under boost

• Rebuildable design with gauge port included; -6AN O-ring ports

• Fittings not included; mounting bracket included, red finish

This adjustable fuel pressure regulator is built for fuel injection systems, with a 40–75 PSI range and a return (bypass) design that routes excess fuel back to the tank rather than blocking flow. It includes a 1:1 boost-reference vacuum port, letting fuel pressure rise proportionally with boost in forced-induction applications, and a gauge port for direct pressure monitoring.

The regulator body is CNC-machined billet aluminum with a red finish, using -6AN O-ring threaded inlet and outlet ports. Unlike TSP's carbureted non-return regulators, this unit is rebuildable, and a mounting bracket is included. Fittings are not included and must be sourced separately. Confirm your fuel delivery type, pump capacity, and pressure requirements before final installation.

Applications
Fits gasoline fuel injection systems requiring 40–75 PSI regulation, including boost-referenced setups in forced-induction applications. This is a fuel-injection-specific regulator; it is not designed for carbureted systems, which use TSP's separate 1–4, 4.5–9, and 5–12 PSI non-return regulators instead.

Installation
Mounts inline using the included bracket. Confirm -6AN O-ring port sizing, hose routing, and return-line requirements before installation, since fittings are not included. The boost-reference vacuum port should be connected according to your specific EFI system's boost reference point for accurate pressure compensation.

What pressure range does this regulator support?
This fuel pressure regulator is adjustable from 40 to 75 PSI and is designed specifically for electronic fuel injection (EFI) systems.

Is this compatible with carbureted fuel systems?
No. This regulator is designed exclusively for EFI fuel systems. Carbureted applications should use one of TSP's non-return fuel pressure regulators with a 1–4 PSI, 4.5–9 PSI, or 5–12 PSI pressure range.

What does the boost-reference vacuum port do?
The boost-reference port allows fuel pressure to increase at a 1:1 ratio with engine boost pressure, helping maintain proper fuel pressure across the injectors in supercharged and turbocharged applications.

Is this a return-style or non-return regulator?
This is a return-style (bypass) fuel pressure regulator. Excess fuel is routed back to the fuel tank to maintain consistent fuel pressure.

Does this include a gauge or gauge port?
A gauge port is provided, but a fuel pressure gauge is not included and must be purchased separately.

Is this regulator rebuildable?
Yes. This regulator is rebuildable, allowing internal components to be serviced if needed.

What port size does this regulator use?
The regulator features -6AN O-ring threaded inlet and outlet ports.

Does this include fittings?
No. Fuel line fittings are not included and must be selected separately based on your fuel line size and installation requirements.