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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Zenaido Smith
Phoenix, US
★★★★★ 5
Best pharmacology book ever!
Format: Paperback
I have taken many pharmacology classes, this is the first time I truly understand in a simple way the mechanism of action of medications, kudos to the author for sharing her relax approach to easily learn pharmacology.
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Reviewed in the United States on June 30, 2024
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qd
Chelsea, US
★★★★★ 5
Great for explanation of difficult concepts, with review questions each chapter
Format: Paperback
I always thought I could never understand pharmacology, so going through my Acupuncture school, I got though my pharmacology courses by rote memorization and pure luck. Then, in practice, I realize that I do have to understand pharmacology, what with the high use of medication in patients' daily routine. So I was looking for a hood, concised, simple to understand pharmacology review that I can do a quick study/review on my own time. Thankfully, I found the right book. This book is everything I've been looking for and amazingly simple to understand. I love the review questions at the end of each chapter. I wish I had found this book while in school, but for $20, it's really help me understand why my patients are taking certain drugs. It also helps me understand the western deconstruction of the Chinese medicinal herbs. I wish they'd come out with a pharmacy review just for Chinese medicinal herbs and potential contraindications, just for acupuncturists and herbalists. The current available herbal medicine textbooks just pretty much list the herbs and note western research on it, but not much of an explanation. With age, I find that I can no longer just do rote memorization, so understanding the basics really helps me to remember and apply concepts. I use this book in my clinic concurrently with a textbook on Chinese medicinal herbs pharmacological concepts to help me understand. And for that, I give it the five stars it deserves.
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Reviewed in the United States on June 8, 2021
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Brian Geiger
Bozeman, US
★★★★★ 5
Good study assist.
Format: Paperback
Great book for a person just getting into medicine. Really good review for those that are just refreshing themselves.
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Reviewed in the United States on October 2, 2025
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Grm
Houston, US
★★★★★ 5
Awesome book
Format: Paperback
Really helpful and complete book for my studies in pharmacology.
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Reviewed in the United States on August 19, 2025
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Noah
Lowell, US
★★★★★ 4
Covers What you need
Format: Paperback
This product is good bc it covers the stuff you need to know without the excess information. Anyone in any professional school or out of school and needs to brush up on concepts, this is a good resource to go too!
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Reviewed in the United States on June 27, 2024

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