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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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For Your Every Summer RSVP, with Code: SUMMER15
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
4.2 ★★★★★
Based on 2184 reviews
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Product Reviews
★★★★★ 4
The product is okay…
Very soft and the pattern is pretty but the blanket is VERY THIN! It’s used (in my opinion) as a summer throw blanket. Was it worth the price? Not really the most I’d pay is $5 because of how thin it is.
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Reviewed in the United States on December 3, 2025
★★★★★ 5
Very cute, super soft
Color: Super Mom Ice
I bought this for my daughter for Christmas and she loved it! The Super Mom blanket was adorable and really soft!
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Reviewed in the United States on January 1, 2026
★★★★★ 5
Longtime Berkshire Buyers 🩶
Color: Stormy Weather, Size: King (90 in x 108 in)
We have been Berkshire buyers for years and they never disappoint with their quality. They always make the best bedding on the market at a reasonable price point. In the economy we currently live in, it's getting harder to find quality products that don't break the bank & Berkshire has been consistent for years!
This blanket is no different & has held up to their name and brand. This blanket is large, which I love. There's nothing more annoying than trying to cover your whole body with a 50x60 sized blanket lol. This blanket is most definitely aesthetically pleasing but also keeps us warm. It feels like this blanket traps our own body heat and keeps it contained instead of producing heat, making us hot. We always stay a nice, consistent temp without getting overheated and sweaty....nobody wants that lol. It's made from high-quality fabric that isn't only soft and comfy but it's woven tightly and has held up wonderfully for how much we use it! This blankey also washes really well ((i.e. zero shrinkage, dries in an adequate time, no color fading and/or bleeding)). I also appreciate that even though this blanket keeps us warm, it isn't heavy & pretty lightweight compared to some of our other non Berkshire blankets. The color is also a rich blueish, cool colored gray that accentuates all of our decor and other bedding.
Overall, Berkshire has always been a household name in ours. We love the quality, the consistency of knowing what we're getting when we purchase from their brand, and the prices are always crazy reasonable without sacrificing what you receive. Hands down another great item from their brand & we will always recommend ✔️
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Soft, plush, lovely
Color: Blue Moment, Size: King (90 in x 108 in)
We got this blanket in king size to use in lieu of a comforter in the warmer months. It's incredibly soft and luxurious. It's thick enough to feel plush and heavy, but thin enough to be perfect for a cool summer night.
It feels like really excellent quality, too. This is not cheap thin fleece. I've only washed it once so far, but it seems like it'll hold up to many washes. It's big, though, at least in king size. It takes up pretty much our entire washing machine, so it needs to be washed by itself or with little else. To dry, I tossed it in the dryer for 40 minutes or so on medium heat and then hung it over a banister to finish drying, and this seemed to work well.
It's also a very pretty blue, like a dusky light blue, just lovely. Overall, I'm very happy with this blanket.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
A good lightweight blanket
Color: Blue Moment, Size: Twin (60 in x 90 in), Color: Blue Moment, Size: Twin (60 in x 90 in)
With perpetually dry hands I have issues with certain fabric textures. This Velvetloft blanket is on the border of triggering, but nothing like how the Classic Extra-Fluffy Plush throw is. The ribbing is interesting visually, but also made the blanket feel a lot lighter too. Definitely one I'll keep on the couch for a chilly day and not for my bed.
When I washed it I was expecting a lot of shedding like the Classic one, but there wasn't as much. I washed it on cold and dried it on the delicate setting since I don't have a good place to air dry. It doesn't appear any worse off than before I washed it.
Overall I like this one way more than the Classic, but the Primalush wearable blanket is still my favorite.
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Reviewed in the United States on April 28, 2026