Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT
SKU: 27929156033

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: 27929156033

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4.6 ★★★★★
Based on 1168 reviews
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Product Reviews
D
Verified Purchase
Donna McGee
Louisville, US
★★★★★ 3
Nice but…
Color: Blue Green Orange
Nice but not very sturdy and it comes rolled up so it’s difficult to get it to lay down for your dog.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 5
Both my dogs LOVE find the treat game time!
Color: Orange Red Blue, Color: Orange Red Blue
Both my dogs have loved this for years. Both senior dogs - great fun activity for them and they really hunt for all the treats we hide! My little one usually wins and takes over the game board then uses it as a lounger after :-) It’s very interactive with different ways to hide treats and challenge the dogs. We’ve had it awhile and it has stood up to many uses and washes. Very easy to store and simply roll out when it’s game time. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
G
Verified Purchase
Gen
Houston, US
★★★★★ 5
Perfect for snuffle dogs
Color: Blue Green Orange
If your pup/dog snuffles EVERYTHING or has a demanding intellectual stimulation food regime they set themselves this is for you! I have to roll out the mat above the floor to situation treats, but once it hits the floor my puppy is preoccupied for hours. She has so much fun sniffing through every element to find her treats. While the mat is easy to use I recommend rolling it back up immediately once most treats have been found to avoid chewing on the actual mat pieces (this could present a durability issue as the fabric is chewable). I use different flavored and textured treats throughout the mat as well as her normal dog food to keep her interested. Definitely worth the money if you have a snufflopogus puppy like I do.
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Reviewed in the United States on April 26, 2025
M
Verified Purchase
Michelle M
Charlottesville, US
★★★★★ 5
Durable and engaging!!!
Color: Blue Green Orange
This has been a game changer! My dog all of a sudden started gently chewing on a couple of my shoes while I was at work. I set this out right before I leave for work. My shoes have been safe ever since!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
K
Verified Purchase
Kyaire and Nelly
Omaha, US
★★★★★ 5
My dog LOVES this!
Color: Blue Green Orange
My dog LOVES this thing! It keeps her busy for a good 45 minutes if she gets distracted, we use it to hide her food because she swallows it whole when we feed her in a bowl. So this has slowed her eating wayyyy down and has helped immensely in keeping her occupied. The quality is nice, i love that it’s felt, BUT it seems like if she scratches at it enough, the strings of the fabric come out and feels fuzzy. I’m not sure how to describe it but it looks like it might experience some pretty bad ware and tear after a while. I love how easy it is to set up, and the variety of folds help the food get stuck so that my dog can sniff and dig her way around. Very nice toy set up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 9, 2025

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