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Description
Holley EFI Billet Bypass Fuel Pressure Regulator Kit 12-848KITHolley EFI billet bypass fuel pressure regulator kit is part of a complete line of fuel system products from Holley. The included 12 848 regulator features a billet aluminum body and a black finish for corrosion resistance. The regulator contains 10 AN in out ports, a 8 AN return port, a 1 8" NPT gauge port, and a 1 8" NPT vacuum port for boost reference (1: 1). In addition, 3 adapter fittings, a barbed fitting for the vacuum port, a mounting bracket,
Holley EFI billet bypass fuel pressure regulator kit is part of a complete line of fuel system products from Holley. The included 12-848 regulator features a billet aluminum body and a black finish for corrosion resistance. The regulator contains 10 AN in/out ports, a 8 AN return port, a 1/8" NPT gauge port, and a 1/8" NPT vacuum port for boost reference (1:1). In addition, 3 adapter fittings, a barbed fitting for the vacuum port, a mounting bracket, and all necessary hardware are also included for an easy installation.
Features:
- Die Cast Aluminum Construction
- Adjustable from 15-60 psi for precise fuel pressure adjustments
- Used in return style systems with a line back to the fuel tank
- 10 AN O-ring Inlet, Outlet, and 8 AN O-ring Return Port
- 1/8Ó NPT Gauge Port and Earl's Fuel Pressure Gauge (100187ERL)
- 1/8" NPT Boost Reference (1:1) and Barbed Fitting
- Included mounting bracket
About Holley EFI
Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!
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Exchange/Return Notes
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- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Bouncy, not hard, and good value.
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value.
By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Excellent dog balls — safe design and very durable
Style: Fetch Balls (Pack of 3), Size: 2.5 inch
These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference.
Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design.
Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.
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Reviewed in the United States on December 1, 2025
★★★★★ 5
Great ball for heavy chewers
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Durable
Style: Fetch Balls (Pack of 2), Size: 3 inch
Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
My dog loves glowing fetch at night!
Style: Glow Balls (Pack of 3), Size: 2.5 inch
Fantastic. Sturdy. My dog loves them
Glow in the dark is great for fetch at night. I keep a flashlight with me because the glow doesn't last really long. But they charge very quickly and are really bright.
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Reviewed in the United States on February 22, 2026