Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT
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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4.0 ★★★★★
Based on 338 reviews
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Shay K.
Whiting, US
★★★★★ 4
Great price!
Color: Silver
For the price I'm extremely happy with this juicer! Easy to clean! I will say it's a little difficult to make large batches with this juicer. I just keep a pitcher beside me and dump the container when it gets full. I do find myself cleaning the grater a few times while I'm juicing because it does tend to get clogged. If you're new at juicing and want to try it...get this! Totally worth it! Gets the job done. I've used mine several times so far, but still can't see myself paying $300+ for a juicer.
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Reviewed in the United States on April 24, 2026
S
Verified Purchase
Sandra Fernández Almeida
Draper, US
★★★★★ 5
Powerful Juicer for Fresh Drinks
Color: Silver
This juicer works great and extracts juice quickly and efficiently. It handles fruits and vegetables very well, and the juice comes out smooth. The machine is easy to assemble and clean, which is a big plus. Perfect for making fresh, healthy drinks at home.
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Reviewed in the United States on April 27, 2026
C
Verified Purchase
Catzee Gonzalez
Battle Creek, US
★★★★★ 5
Love my juicer
Color: Silver
This juicer is amazing easy cleaning zero leaking makes no mess really easy use. The design on this juicer is more than perfect.
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Reviewed in the United States on May 17, 2026
L
Verified Purchase
Lanaya thomas
Battle Creek, US
★★★★★ 3
Not that great
Color: Silver
Not bad for the price but it leaves a lot of pulp behind and I don’t like that it could be better but again decent for the price easy to use you just have to strain the juice a lot to get all the pulp out and once you do it’s like 60% pulp 40% juice when you go in the back to look at or throw out the juiced fruit you can feel how much juice is still in it
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Reviewed in the United States on April 18, 2026
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 4
🍎🍐🍊🍋🍋‍🟩🍌🍉🍇🍓🫐🥭
Color: Silver, Color: Silver
Easy to use, fairly easy to clean if you don’t mind all the parts. I feel that the noise level was normal for a juicer. The juice pitcher doesn’t hold much, but if you are just juicing for 2 people it’s fine. I did have an issue with mine and had to order a replacement, but overall it was still a great buy. I’m new to juicing so I didn’t take the core out of a plum and ended up cracking my fruit/veggie pusher, but other than that I love it. I also like the fact that it comes with a juice recipe booklet to try different juices.
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Reviewed in the United States on April 18, 2026

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