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Holley Carbureted By-Pass Regulator 12-881

Holley Carbureted By-Pass Regulator 12-881
$78.99 ea
NEWBackordered until 01/27/2022Out of stock at HOLLEY PERFORMANCE PRODUCTS as of 08/05/2021
Model: 3991321
Supplier has not provided any fitment data for this product.
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Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Too much fuel pressure for a given needle and seat assembly can overload the needle and seat and may cause flooding or drivability problems. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. All Holley regulators are pre-set at the factory so there is no guesswork when first installing the regulator.
Features:
  • Die Cast Aluminum Construction
  • 3/8 NPT Inlet/Outlet/Return Ports
  • 1/8 in. NPT Gauge Port
  • Boost Reference 1:1
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
Regulator is compatible with Diesel #1 and Diesel #2.
About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy 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!

Downloads:

Download Name File Size
199r11227.pdf414.2KB

Videos:

Specifications:

Color Chrome
Emission Code 5
Fuel System Carbureted
Fuel System Type Carbureted
Fuel Type Gasoline
Inlet Size 0.375 in. NPT
Material Aluminum
Outlet Size 0.375 in. NPT
Part Type Fuel Pressure Regulator
Pressure 4.5-9 PSI
Pressure Range 4.5-9 PSI
Return Size 0.375 in. NPT
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm

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