Holley Bypass Regulator Fuel Pressure 6.0 Psi - Durable Chrome Finish

Our review of the Holley Bypass Regulator finds it best suited for DIY mechanics and performance-minded vehicle owners who need a reliable, budget-friendly fuel pressure solution. The single biggest reason to buy is its solid die cast aluminum construction combined with a simple bypass design that delivers stable 6.0 psi fuel pressure and long life without fuss. The regulator is straightforward to fit to vehicle-specific installs and includes a boost reference barb, making it a practical choice where durability and consistent performance matter more than adjustable complexity.

Key Features

• Die cast aluminum construction: Provides a durable, corrosion-resistant housing that holds up under heat and vibration for long service life.
• 3/8 NPT ports: Inlet, outlet, and return ports use common 3/8 NPT threads for straightforward plumbing in most fuel systems.
• 1/8 NPT gauge port: Allows neat installation of a fuel pressure gauge for easy monitoring without cutting lines.
• 1/8 in NPT boost reference: Includes a barb fitting to accept boost reference lines for use with forced-induction engines.
• Vehicle specific fit type: Designed to integrate cleanly into targeted vehicle applications where fit and routing matter.

Who It's For

This regulator suits owners upgrading or repairing fuel systems on vehicles where a fixed 6.0 psi bypass regulator is desired. It appeals to users who prioritize durability, simple plumbing with 3/8 NPT ports, and the convenience of a built-in gauge port and boost reference fitting.

It is less appropriate for users who need an adjustable regulator for tuning across a wide range of pressures. Customers seeking frequent on-the-fly pressure changes or custom pressure ranges should look at adjustable units instead.

Pros & Cons

Pros

• Solid die cast aluminum body offers long-term durability and a clean chrome appearance.
• Standard 3/8 NPT inlet, outlet, and return ports make plumbing to most systems simple.
• Built-in 1/8 NPT gauge port and included 1/8 in boost reference barb add convenient monitoring and boost-compensated operation.

Cons

• Fixed 6.0 psi setting means limited adjustment ability noted by users who wanted a tunable regulator.

Specifications

Brand	Holley
Design	Bypass style fuel pressure regulator
Nominal Pressure	6.0 psi
Body Material	Die cast aluminum
Ports	3/8 NPT inlet, outlet, return; 1/8 NPT gauge port
Boost Reference	1/8 in NPT barb fitting included
Fit Type	Vehicle Specific

Our Verdict

The Holley Bypass Regulator is a solid, no-nonsense choice for those who need a durable, fixed 6.0 psi regulator that integrates easily into vehicle-specific installs. Its die cast aluminum build, standard NPT ports, and boost reference make it good value for owners focused on reliability and straightforward performance, while buyers needing adjustable pressure control should consider a different model.

Frequently Asked Questions

Is this regulator adjustable?
No. This unit is a fixed 6.0 psi bypass regulator and does not provide adjustment capability.

Does it include a boost reference fitting?
Yes. It includes a 1/8 in NPT barb fitting for boost reference connection.

Can I fit a gauge to monitor pressure?
Yes. A 1/8 NPT gauge port is provided for easy installation of a fuel pressure gauge.