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

Holley Boost Compensating Universal EFI Fuel Pressure Regulator 512-504-5
$54.99 ea

NEWARRIVING SOONEstimated Ship Date 07/14/2025 (If Ordered Today)2 Available from HOLLEY PERFORMANCE PRODUCTS as of 06/24/2025
Model: 3992803
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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
About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!

Downloads:

Download Name File Size
fuel_pump_tech_info.pdf168.1KB
199r10037rev1.pdf161.79KB

Specifications:

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
Part Type Fuel Pressure Regulator
Pressure Range 15-65 PSI
Product Type Fuel Pressure Regulator
Proposition 65 www.P65Warnings.ca.gov
Return Size 6 AN O-Ring
Style Bypass
Warranty Limited 90 Day

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