Holley Adjustable Billet By-Pass Regulator-3/8″ NPT – Black

Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. They are offered with two port sizes, 3/8″? NPT or 6AN to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way.

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM’s popular LS engine are dominating the LS scene as well. Holley’s products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!

Fuel Injection Pressure Regulator

Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks

Used in systems with a return line back to the tank

(1) 3/8″ NPT Inlet; (1) 3/8″ NPT Outlet; and (1) 3/8″ NPT Return Port

Includes fitting for manifold reference

Includes an 1/8 NPT gauge port

Boost Reference – 1:1

The 4-15 psi carbureted spring comes installed in the regulator

Compatible with diesel fuel and E85

Product Description:

Fuel Pressure Regulator

HP Billet

4 to 65 psi

In-Line

3/8 in NPT Inlet

3/8 in NPT Outlet

3/8 in NPT Return

1/8 in NPT Port

Bypass

Aluminum

Black / Clear Anodized

Diesel / E85 / Gas

Sold Individually

For over a century Holley has driven the cutting edge of fuel-system design. That work continues today through Holley’s market-leading EFI products as well as through Holley’s family of best-in-industry brands. Top brands like MSD, Flowmaster, Hurst, Accel, and many more make up the industry’s leading offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holley’s commitment to its customers and their cars is at the core of everything we do.