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12-879 Billet By-Pass Fuel Pressure Regulator, 4-65 PSI, Anodized black and clear, Gas/Diesel/E85, Return, Sold Individually

You Save : $17.05 (10%)
List Price : $163.00
Manufacturer #12-879
( Reviews)
Questions, Answers
Universal Fit Add Vehicle


Billet By-Pass Series
Recommended Use:
Product Fit:
Quantity Sold:
Sold individually
90-day Holley limited warranty
Adjustment Range:
4-65 PSI
Anticipated Ship Out Time:
15-16 business days
Anodized black and clear
Gauge Port:
Inlet Quantity:
Inlet Size:
3/8 in. NPT
Outlet Quantity:
Outlet Size:
3/8 in. NPT

Product Information


  • Available as universal-fit or direct, bolt-on replacement
  • Premium aluminum construction for ideal weight and superior durability
  • Facilitates precise control of fuel pressure from fuel pump to carburetor
  • Optimally adjusts flow to meet your carburetor’s fuel pressure requirements
  • Offered in wide variety of sizes, styles and configurations

Prevent stalling, flooding and other drivability problems by making sure your carbs are getting the right amount of fuel pressure with Holley’s fuel pressure regulators. With over 100 years of experience, Holley is one of the most recognized names in fuel delivery systems and their carburetors have powered every NASCAR Sprint Cup team for over four decades.

See product for application and installation details.
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 90 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Question and Answer

Will it work with fuel injection ?Maynard C.Sep 14, 2020
Best Answer:Hi Maynard, This is a universal fit fuel pressure regulator that is not vehicle specific on the application. For accuracy of fitment, please follow the guidelines below: To check the fitment please use our Vehicle Selector — which can be found towards the top of the homepage as well as all categories, search results, and product pages — can help verify if a part will fit your specific application. To enter your application, simply select your vehicle’s year, make, model, sub-model, and engine type and click “Go.” Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page.
Grace G.STAFFSep 14, 2020
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