Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT
Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT
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Material:
Adjustable billet by-pass return style fuel pressure regulator 3/8 NPT Kit with Fuel Pressure Gauge and Adapter Fittings Boost Reference - 1:1
Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They have 3/8 NPT port sizes to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators 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
- 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
Specs:
Adjustable | Yes |
---|---|
Brand | Holley |
Color | Black |
Emission Code | 5 |
Fuel System | EFI/Carb |
Fuel Type | Gasoline |
Gauge Included | Yes |
Gauge Port Included | Yes |
Grade Type | Performance |
Inlet Gender | Female |
Inlet Port Diameter | 3/8Inch |
Inlet Port Quantity | 1 |
Inlet Size | 3/8" NPT |
Inlet Type | NPT |
Material | Aluminum |
Maximum Pressure | 65Pounds per Square Inch |
Minimum Pressure | 4Pounds per Square Inch |
Mounting Bracket Included | Yes |
Mounting Type | Inline |
Outlet Gender | Female |
Outlet Port Diameter | 3/8Inch |
Outlet Port Quantity | 2 |
Outlet Size | 3/8" NPT |
Outlet Type | NPT |
Port Quantity | 2 |
Product Type | Fuel Pressure Regulator |
Rebuildable | Yes |
Return Size | 3/8 inch NPT |
Style | Bypass |
Vacuum Port Quantity | 1 |
Warning | California Proposition 65 |
Warranty | Limited 90 Day |







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Return Policy
Fault reasons include but are not limited to:
- Buyer was shipped the wrong product
- Buyer was shipped a damaged product
- The product page had incorrect fitment and the part does not fit the Buyer's vehicle
Opened boxes, plastic bags, and other packaging are not considered damage (excluding single use items such as, but not limited to, liquids, software, and other components that cannot be reused/resealed).
FAQs
|Q. What is an Intermediate Brake Line?
|A. This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.
|Q. What is included in a pre bent brake line kit?
|A. Our kits include all of the solid metal lines for that section of the vehicle
|Q. I need to return something - what's your return policy?
|A. We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.
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Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
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If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.