Boost Compensating Universal EFI Fuel Pressure Regulator - 512-504-5
SKU: 85966301440

Boost Compensating Universal EFI Fuel Pressure Regulator - 512-504-5

Sale price$202.47 Regular price$224.97
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

Boost Compensating Universal EFI Fuel Pressure Regulator - 512-504-5Overview: This precision adjustable fuel metering regulator is the ultimate fuel pressure control unit designed to work on all naturally aspirated EFI, turbo and supercharged applications like vehicles that run in the Pro Street, Pro Import and Outlaw classes. This is a 2 port 1: 1 boost compensating return style regulator that is adjustable from 15 65 PSI + boost reference and is designed to be used in conjunction with any electric EFI fuel pump.

Overview:

This precision adjustable fuel metering regulator is the ultimate fuel pressure control unit designed to work on all naturally aspirated EFI, turbo and supercharged applications like vehicles that run in the Pro Street, Pro Import and Outlaw classes. This is a 2 port 1:1 boost compensating return style regulator that is adjustable from 15-65 PSI + boost reference and is designed to be used in conjunction with any electric EFI fuel pump. Features built in gauge port, mounting bracket, two AN -8 O-ring fittings and a AN-6 O-ring return fitting. Black anodized.

Features:

  • Black anodized
  • Easy installation
  • -8an & -6an o-ring style fittings included to adapt to steel braided fuel lines
  • Designed to regulate high fuel demands for naturally aspirated EFI, turbo, supercharged and nos race applications
  • Engineered to regulate extreme flow volumes generated by racing fuel systems
  • CNC machined billet aluminum
  • Allows adjustment from 15-65 psi + boost reference

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley
Color Hard Coat Anodized
Emission Code 4
Fuel System Gasoline
Fuel Type Gasoline
Inlet Size 8 AN O-Ring
Material Aluminum
Outlet Size 8 AN O-Ring
Pressure Range 15-65 PSI
Product Type Fuel Pressure Regulator
Return Size 6 AN O-Ring
Style Bypass
Warning California Proposition 65
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: 85966301440

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Stephenochi
Cuba, US
★★★★★ 5
Good pillow protector
Size: Queen Size (Pack of 2)
Looks and feels very durable. Didn't notice and odor when opened or in use. Fits my Coop Home Goods pillow perfectly! Sleep quality is still good with these covers on.
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Reviewed in the United States on March 29, 2026
M
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MeMe🦋
Birmingham, US
★★★★★ 4
Very nice but expensive
Size: Queen Size (Pack of 2)
I love these cases, they didn't let out as much air as I had hoped for out the sides so I only zip it up half way so my pillow stays squishy and moldable and not partially filled with air which changes the feel of your pillow. Other then that they are great, they are very soft and quite, there is no noise whatsoever and there is some thickness to it adding a little more softness to your pillow. I ended up buying a second set. I just wish it had a little more airflow through the sides so I didn't have to leave it unzipped, that kind of defeats the purpose. I also think they are a little more expensive then they should be.
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Reviewed in the United States on February 2, 2026
K
Verified Purchase
Karma89love
Whiting, US
★★★★★ 5
Does not change the pillows effectiveness at all.
Size: King Size (Pack of 2)
As of right now, I have not noticed anything with these covers that would significantly alter the way the pillows feel. I'm greatful that they are not noisy as most other covers are. I also appreciate that they have very much the same feel as the covers that come on the pillows. One thing I can say so far with confidence is that even though this is an additional layer to my pillows, the original feeling, specially with the Eden cool+, has been the same in terms of coolness and breathability.
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Reviewed in the United States on April 2, 2026
J
Verified Purchase
jakobsmom
Pawtucket, US
★★★★★ 5
SUPER SOFT - GREAT QUALITY!
Size: Crescent Queen
This crescent pillow protector is more than I expected, as far as softness and just the overall quality of it. I wish my PILLOW was as nice as this protector! Definitely recommend.
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Reviewed in the United States on March 23, 2026
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BLV
New York, US
★★★★★ 5
Exactly as described
Size: Crescent Queen
This pillow cover is everything they said it would be. Comfortable, no crinkle sound. Fits the pillow like a glove. I highly recommend.
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Reviewed in the United States on April 26, 2026

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