SKU: 63849965826

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

Sale price$93.57 Regular price$103.97
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Description

Adjustable Billet By-Pass Regulator-3/8 NPT - 12-879Overview: 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 are offered with two port sizes, 3

Overview:

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 are offered with two port sizes, 3/8" NPT or 6AN 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 Port
  • 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
  • Compatible with diesel fuel and E85

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley
Color Black
Emission Code 5
Fuel System EFI/Carb
Fuel Type Gasoline
Inlet Size 3/8 inch NPT
Material Aluminum
Outlet Size 3/8 inch NPT
Product Type Fuel Pressure Regulator
Return Size 3/8 inch NPT
Style Bypass
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: 63849965826

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4.0 ★★★★★
Based on 9 reviews
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Della J.
Omaha, US
★★★★★ 4
Nicely made and pretty.
Very sweet pair of earrings. I bought blue and pink butterfly earrings. My daughter loves them. They are well made and just the right size for a young person. I will recommend them.
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Reviewed in the United States on February 5, 2025
M
Verified Purchase
Mikki
Chelsea, US
★★★★★ 5
Good value
Love them! So light and pretty!
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Reviewed in the United States on September 7, 2025
A
Verified Purchase
Anita M Gayler
Battle Creek, US
★★★★★ 5
Beautiful earrings that work fantastically with multiple earlobe piercings
I was looking for smaller cute studs in garnet and these are amazing. I have four “regular” piercings going up my earlobes on each side into my cartilage so I prefer to have stud earrings that are small enough to not overlap and crowd, but also be super cute, and these did really well. Despite the size you could still clearly tell they were butterflies and marquise cut gemstones. Because they’re garnets and the marquise cut is slightly shallow for earring purposes, they’re not that DEEP red color people associate with a garnet, but they’re clearly garnets and the slightly brownish tinge from the shallower cuts actually set off my (dyed) red hair beautifully. If you’re more to chestnut brown or redheaded, it’ll probably work in your favor as well. Overall I would highly recommend these to anyone looking for a good pair of beautiful and playful gemstone earrings, and heavily recommend them for any adult with more than two lobe piercings that wants to do more than just plain gemstone round studs.
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Reviewed in the United States on February 12, 2020
A
Verified Purchase
Anthony Pantliano
Fort Morgan, US
★★★★★ 5
Mom loves them.
I bought these earrings for my Mother as a Mother's Day gift. They are petite (a bit larger than a pencil eraser) and are very nicely made, especially considering the price. The garnets (which are my Mom's birthstones) are rich and beautiful, and the sterling silver is fairly substantial. My Mom wears them at least once a week and has had no issues with fit or allergic reactions of any kind. All in all... perfect for those who like small, understated earrings.
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Reviewed in the United States on June 13, 2013
S
Verified Purchase
Snell
Fort Morgan, US
★★★★★ 3
Fine, but small
The earrings are a bit small, like the ratings say, and the color is a bit weak, but they're still okay.
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Reviewed in the United States on January 20, 2025

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