Air and Fuel› Fuel Pumps, Regulators and Components

Holley

REG, FUEL PRESSURE 4.5-9 PSI M/P 10-17

$245.50

SKU: H00E 12-803

In Stock
In Stock
Ships by Jun 10
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Holley 12-803 is a 2-port fuel pressure regulator designed for use with high-performance fuel pumps, featuring a .220" restriction and 3/8" NPT inlet/outlet ports, capable of regulating fuel pressure between 4.5-9 PSI.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E 12-803
Weight0.55 lb

Videos

Adjusting Holley Fuel Pressure Regulator - model 12-803 - Blue Fuel Pump 110GPH

Adjusting Holley Fuel Pressure Regulator - model 12-803 - Blue Fuel Pump 110GPH
Holley 12-803 Fuel Regulator Modification

Holley 12-803 Fuel Regulator Modification
Holley Fuel Regulator Install - 69 Camaro - Carb

Holley Fuel Regulator Install - 69 Camaro - Carb
INSTALLING HOLLEY FUEL PUMP, FUEL REGULATOR & FUEL PRESSURE GUAGE ON 1963 AUSTIN HEALEY SPRITE

INSTALLING HOLLEY FUEL PUMP, FUEL REGULATOR & FUEL PRESSURE GUAGE ON 1963 AUSTIN HEALEY SPRITE
Holley Die Cast Bypass Fuel Pressure Regulators

Holley Die Cast Bypass Fuel Pressure Regulators

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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