SKU: 22440579487

Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT

Sale price$119.67 Regular price$132.97
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Description

Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KITAdjustable 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

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
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 22440579487

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4.6 ★★★★★
Based on 18 reviews
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S
Verified Purchase
Sandy H.
Alexandria, US
★★★★★ 5
Great quality and extra gift
Color: Gold-b, Color: Gold-b
This thing was so easy to put together and really pretty. And they sent a little extra gift with the purchase, which was some very nice dish cloths. Thank you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
E
Verified Purchase
Ev Ting
New York, US
★★★★★ 5
Beautiful & Great Price!
Color: Gold-b, Color: Gold-b
I was looking at a $60 Williams & Sonoma “honeycomb collection” marble paper towel holder with gold bee accents, but decided to save a bunch of money and go with this one. Glad I did! It’s awesome!!! Easy to put together with the wrench that’s included, it’s packed well - great product for the price and they sent a free gift with it too. Received 3 super soft dish cloths along with the paper town holder. Unexpected surprise and happy with them too!! Just placed an oder for another one for the other bathroom sink. This will not be in a high use area so I’m not worried about the base getting beat up. I feel like it’s just the right weight. Not as heavy as real marble, but heavy enough to hold the towels securely. The gold is a pretty shade.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 16, 2025
K
Verified Purchase
kentra
West Palm Beach, US
★★★★★ 5
perfect!!!
Color: Gold-b
great quality love look of it just what i was looking for looks great in space where i am using it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
K
Verified Purchase
Kat 😺
Port Orchard, US
★★★★★ 5
Heavy marble base and solid rod holder.
Color: White-aa, Color: White-aa
After researching the many different marble base towel holders, which is what I wanted to match my marble decor, I finally settled on this which arrived today, packed very nicely in a Styrofoam tight box to protect the marble and came with it as you can see a gift of some very soft Microfiber dish cloths, which work very well at removing smudge marks on kitchen appliances. It took me 30 seconds to join the base to the rod. It came with a little tool to tighten the base however it really wasn’t necessary. I then covered the hole under the base with a piece of One-sided circular sticky, felt, which covered the hole very nicely. I have tried it, and it does do as it says, and the marble base is heavy enough where it holds the roll of paper towels so that with a couple of tugs, I can get one of the perforated sections out. Does take more than one tug as some people showed but two tugs or three light ones really doesn’t matter it gets the job done and in a far lower price than any of the others, in fact, some of the recommended others were 2 1/2 times more expensive and the reviews were not good at all. It pays to take the time to go through people’s reviews like mine and that’s why I believe in completing the reviews whenever I can time permitting. I’m giving this a five star and I think that you will too. I was lucky based on some of the other marble bases that were shown for this product that I got a significant amount of gray marbling matter because some of them had very little it’s just the way the marble runs and you take your chance, but I was lucky.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 2, 2025
B
Verified Purchase
Barbara D
Massapequa, US
★★★★★ 4
Base a bit light
Color: Gold-b
Attractive, functional but would benefit from a weightier base
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2025

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