512-504-5 EFI Fuel Pressure Regulator 15-65 PSI + Boost Reference

Name: 512-504-5 EFI Fuel Pressure Regulator 15-65 PSI + Boost Reference
Brand: HOLLEY
SKU: 510-512-504-5
Price: 449.95 USD
Availability: InStock

^$449⁹⁵

Ships on Sep 04, 2026

Lowest Price Guarantee

EFI Fuel Pressure Regulator

15-65 PSI + Boost Reference
CNC Machined Billet Aluminum
Adjustability From 35-65 psi
Bolts In Stock Location
Easy Installation
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

The Holley EFI Fuel Pressure Regulator is a precision adjustable fuel metering device designed to work on all naturally aspirated EFI, turbo and supercharged applications like vehicles that run in the Pro Street, Pro Import and Outlaw classes. This is a 2 port 1:1 boost compensating return style regulator that is adjustable from 15-65 PSI + boost reference and is designed to be used in conjunction with any electric EFI fuel pump.
Features built in gauge port, mounting bracket, two AN -8 O-ring fittings and a AN-6 O-ring return fitting.
All racing regulators come Black hard anodized for ultimate durability.

Features:

Designed to regulate high fuel demands for naturally aspirated EFI, turbo, supercharged and NOS race applications.
Engineered to regulate extreme flow volumes generated by racing fuel systems.
Allows adjustment from 15-65 PSI + boost reference.
Precision CNC machined 6061 T-6 Billet aluminum.
-8AN & -6AN O-Ring style fittings included to adapt to steel braided fuel lines.
Includes detailed installation instructions.

Part TypeFuel Pressure Regulator

Product LineHolley EFI Fuel Pressure Regulator

BrandHOLLEY

Package Height3.1

Package Width5.3

Package Length5.4

Weight1.46 PG

Part CategoryPerformance Parts

Regulator FinishBlack anodized

Outlet Size-8 AN

Inlet Size-8 AN

Boost/Vacuum Rise Ratio1:01