Adjustable Billet By-Pass Regulator-3/8 NPT - 12-879
SKU: 63849965826

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

Sale price$93.57 Regular price$103.97
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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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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William Aduddell
Fort Morgan, US
★★★★★ 5
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Perfect toy for a small dog, soft and light weight.
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Reviewed in the United States on April 16, 2026
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Bluemustang
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★★★★★ 1
Destroyed in an hour
Size: Rabbit & Elephant
My 3 year old 20 lb dog chewed the nose and squeaker out within an hour after receiving this toy. Had to throw it away.
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Reviewed in the United States on February 26, 2026
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Sheila A. Dechantal
Dallas, US
★★★★★ 3
Cute but way smaller than I thought they would be
Size: Rabbit & Elephant
Quite possibly on me and maybe I missed information on the size - I was a little surprised when I opened the package and saw how little these were. still cute and my dogs enjoy them.
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Reviewed in the United States on December 5, 2024
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VegasHawkeye
Massapequa, US
★★★★★ 5
Picky dog approved!
Color: S6-muti-color, Color: S6-muti-color
I have wasted so much money on dog balls that they won't even pick up! They finally were obsessed with the Kong rubber green/blue or red/blue ones, but they're $3+. each, and they break from the dogs squishing it. I honestly had zero expectations on these, and they BOTH picked them up on the first throw! That's huge!! Seem to work fine in the ChuckIt. As for the squeaker, at first I was like "Oh nooooo." when they both loudly started! Much to my (and my neighbors') happiness, the squeakers stopped working after a couple minutes. 🤣
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Reviewed in the United States on February 2, 2025
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William Lovelace
Lexington, US
★★★★★ 5
Great dog toys
Color: S6-muti-color
These are long lasting, durable dog toys. My dogs love the squeak sound.
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