Product Summary

Universal Fit, 4-65 Fuel Pressure Rating (psi)

  • The 4-15 psi carbureted spring comes installed in the regulator
  • Includes fitting for manifold reference and an 1/8 NPT gauge port
  • Designed to be used in systems with a return line back to the tank
  • It is adjustable from 4-65 psi for precise fuel pressure adjustments
  • Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks
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Key Specs

MFG. Part #12-879
BrandHolley
Regulator StyleBypass Return Style
Material TypeBillet Aluminum
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Holley 12-879 Details

Holley Billet Fuel Pressure Regulators are just part of the complete line of fuel system products that Holley offers. This regulator is constructed from 6061-T6 billet aluminum for strength and durability. Adjustable from 4-65 psi and will handle both carbureted and EFI applications. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, this regulator will have you covered either way.
Features:

  • Adjustable from 4-65 psi for precise fuel pressure adjustments
  • 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

Features

  • Adjustable from 4-65 psi for precise fuel pressure adjustments
  • 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

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Holley 12-879 Specifications

KEY SPECS
MFG. Part #12-879
BrandHolley
Regulator StyleBypass Return Style
Material TypeBillet Aluminum
GENERAL
Fuel Pressure Rating (psi)4-65
Sold in QuantityEach
GTIN Code090127734971

Ratings & Reviews

4.5

2 Reviews

Overall Assessment

Customers highly recommend our fuel regulator for its undeniable quality and practicality. Specially highlighted is its superior performance in high-demand environments, like drag racing, which sets it apart from competitors. Users noted its easy installation process and the remarkable difference it made in their vehicles, demonstrating the product's excellent usability. There are ongoing recommendations due to its top-notch material quality that ensures safety and performance, evidenced in classic cars like a 1990 Mustang 5.0. Overall, the product is perceived as a reliable choice for enhancing vehicle performance.

4.5

2 reviews

5

1

4

1

3

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Have not installed yet

4.0

a year ago

Dmp

Clinton Md.

Verified

Needed a fuel regulator and this was recommended

Would Recommend

I would buy this product again

5.0

3 years ago

Doug

Iowa

Verified

I installed this in my 1990 mustang 5.0 drag racing car.

Would Recommend

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