Brand: Holley
12-879 Holley Adjustable Billet by-Pass Regulator Kit 3/8 in. NPT
Adjustable billet by-pass regulator kit with 3/8 in. NPT and fuel pressure gauge.
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12-879 Holley Adjustable Billet by-Pass Regulator Kit 3/8 in. NPT
The adjustable billet by-pass return style fuel pressure regulator kit features 3/8 NPT 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.
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.
With 3/8 NPT port sizes, they adapt to your new or existing fuel lines.
If you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will cover you either way.
This kit includes a 0-100 liquid filled fuel pressure gauge, mounting bracket, and -6 AN to 3/8 in NPT adapter fitting to get you started on your installation.
Key Features
Specifications
- Length
- 7.0 lb
- Width
- 6.55 lb
- Height
- 5.65 lb
- Weight
- 2.21 lb
- ASIN
- B07TVNJN7Y
- UPC
- 090127122921
- Ships From
- United States
- Brand
- Holley
Frequently Asked Questions
About 12-879 Holley Adjustable Billet by-Pass Regulator Kit 3/8 in. NPT
01 What is the adjustable pressure range?
Adjustable from 4-65 psi.
02 What materials are used in the construction?
Constructed of billet aluminum.
03 What ports are included in the kit?
(1) 3/8 in. NPT Inlet; (1) 3/8 in. NPT Outlet; and (1) 3/8 in. NPT Return Port.
04 What is the ASIN for this product?
The ASIN for this product is B07TVNJN7Y.
05 What is the UPC / barcode for this product?
The UPC/barcode for this product is 090127122921.
06 Where does this ship from?
Orders ship from our fulfillment center in Dover, Delaware, USA.
07 How many days will it take to arrive?
Orders ship within 1-2 business days and typically arrive within 4-5 business days via free standard shipping -- usually by Aug 29.
08 Does this product accept returns?
Yes -- this item can be returned within 15 days of delivery for a free return by mail. See our return policy for full details.







