Adjustable Billet By-Pass Regulator 3/8 NPT Kit 12-879KIT
SKU: 22440579487

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

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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
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Exchange/Return Notes
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SKU: 22440579487

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Geoffrey Snow
Louisville, US
★★★★★ 3
Great quality for the Price
Surprisingly decent for the price! The wood is actually pretty and high quality, but the manufacturing isn't great. The set a received is quite rough and my wife continues to think she will get a splinter. They also are oiled but they are quite dry still and also smell heavily of the mineral oil they use.
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Reviewed in the United States on September 9, 2025
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Coffee, Carbs, and Clutter
Massapequa, US
★★★★★ 2
Beautiful but terrible quality.
While I absolutely loved the idea of cutting boards with a stand, these were not the right choice. The wood is exceptionally soft and after the first use the gouges from my knife were pretty deep. After I washed the cutting board from cutting veggies, it started to splinter. Maybe I just got a defective set but I definitely do not recommend this set. Will be returning and getting a different brand/board.
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Omaha, US
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Forever book!! 📖
Format: Hardcover
Required for a course I’m taking. But I’ll use this the rest of my life. Incredible insight. Easy to digest!
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Massapequa, US
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Scholarly resource
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Great resource
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Reviewed in the United States on December 27, 2025
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Grandpa Obi
Belleville, US
★★★★★ 5
Comprehensive and Engaging New Testament Resource
Format: Hardcover
From Pentecost to Patmos, 2nd Edition by Craig Blomberg is an outstanding introduction to the New Testament books from Acts through Revelation. The author combines scholarly depth with clarity, making it an excellent resource for both students and lay readers looking to deepen their understanding of Scripture. Blomberg’s analysis is thorough, offering historical context, theological insights, and practical applications. The updated content in this second edition keeps it relevant, and the engaging writing style makes complex topics approachable. I especially appreciated how each book is tied to its overarching theme in the New Testament narrative. This book is perfect for college courses or personal study, offering a well-rounded exploration of these essential biblical texts. A must-read for anyone serious about understanding the New Testament!
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Reviewed in the United States on December 10, 2024

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