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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:
- 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
4.8 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Treats and plenty of ball throwing with these doggie toy
Size: Medium (2.5"), Style: Fetch Pack 1
I have actually purchased these twice already. I love the one that glows in the dark but it still got lost in my yard lol. My dog is a big breed half pitt/Labrador so she did chew through one of them already. I play ball with her every single day but I DO have to take them away from her because she will destroy them. They are great to add in treats as well, that was one of the my favorite things about them as well. They do last just if you have an over zealous chewer do not let them keep them for long periods of time. They are a good value for the price. Buy them your dog will love it!
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Reviewed in the United States on August 2, 2025
★★★★★ 5
My Female GSD loves
Size: Medium (2.5"), Style: Fetch Pack 1, Size: Medium (2.5"), Style: Fetch Pack 1
Shasta is my smallest. Six in December (2025) along with her brother. She’s 100 lbs and outside, completely ball driven see last picture. Don’t let the size (2.5”) of these Chuck-It balls deter you. If your larger Breed dog has any orthopedic issues, has already torn their ACL etc, one has arthritis but wants to play. This size is perfect!
Shazzy was born with several ortho issues. I don’t throw balls distance but right to her. This size and lighter weight assure even when Shazzy is spazzy w excitement, she’ll catch the ball mid air.
The green balls are softer, and glow in the dark. In summer we can play well past dusk and I can see them!
Her personality shows in the pictures. Playing ball is part of her. These balls are just perfect for her situation. Somehow they disappear, she loves making baskets, puts them in my tractor bucket, or my gardening bucket..then get put in burn pile, trash etc. I keep replacing them because she’d look day and night if we actually ran out!! 🙏✝️👍🏼👍🏼
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 3, 2025
★★★★★ 5
Excellent
Size: 50 Count
Amazon Basics Ultra Paper Bowls, 20 oz, are a practical choice for anyone needing disposable bowls for everyday use or special occasions. Whether you're hosting a casual get-together, packing lunches, or simply want an easy cleanup option after a meal, these bowls offer a convenient solution. They are sturdy enough to hold both hot and cold foods without bending or leaking, which makes them versatile for soups, salads, snacks, and more.
One of the standout features is their generous 20-ounce capacity, providing ample space for a satisfying portion. The bowls have a simple, clean design that fits well in any setting, from picnics to office lunches. Users appreciate their durability and the fact that they are lightweight and easy to stack, saving storage space. Additionally, being disposable, they eliminate the hassle of washing up, which is always a plus for busy households or events.
Overall, these Amazon Basics paper bowls deliver solid performance at a budget-friendly price. They strike a nice balance between functionality and convenience, making them a reliable choice for anyone looking to simplify mealtime cleanup. If you want disposable bowls that handle a variety of foods without fuss, these are definitely worth considering.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026
★★★★★ 5
These paper bowls are actually really sturdy for disposable bowls!
Size: 50 Count, Size: 50 Count
These paper bowls are actually really sturdy for disposable bowls! We use them for everything from cereal and soup to quick toddler meals, and they hold up well without getting soggy or flimsy. I also love that they’re microwave safe, which makes busy days a little easier. Great quality for the price and always handy to keep stocked at home!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
My paper bowls of choice.
Size: 50 Count
I have been a return buyer of these bowls and amazon basics plates, as they are sturdy and well made, even for liquids. I think there is a generous quantity for the price. I use for my to go meals on the way to work, so I dont have my whole kitchen accumulating in my car. They are good sized and you can fit a decent serving. Will keep buying.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
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