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Instruction Sheets for Part Number HLY-512-504-5
Charts & Guides for Part Number HLY-512-504-5
Holley Adjustable Fuel Injection Regulators 512-504-5
Part Number: HLY-512-504-5
Holley Adjustable Fuel Injection Regulators
Fuel Pressure Regulators, Adjustable, 15-65 psi, Inline, -8 AN Inlet and Outlet, -6 AN Return, Female Thread, O-Ring Cut, Aluminum, Black, Each
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Estimated Ship Date: Oct 30, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
512-504-5
Part Type:
Product Line:
Summit Racing Part Number:
HLY-512-504-5
UPC:
090127545416
Regulator Pressure (psi):
15-65
Regulator Style:
Return
Regulator Location:
Inline
Boost/Vacuum Reference Port:
Yes
Boost/Vacuum Rise Ratio:
1:1
Gauge Port:
Yes
Inlet Quantity:
1
Regulator Inlet Size:
-8 AN
Inlet Attachment:
Female straight cut O-ring
Outlet Quantity:
1
Regulator Outlet Size:
-8 AN
Outlet Attachment:
Female straight cut O-ring
Return Fitting Size:
-6 AN
Return Attachment:
Female straight cut O-ring
Fittings Included:
Yes
Regulator Material:
Aluminum
Regulator Color:
Black
Rebuildable:
Yes
Mounting Bracket Included:
Yes
Remanufactured:
No
Quantity:
Sold individually.
Holley Adjustable Fuel Injection Regulators
Holley adjustable fuel injection regulators are able to provide all of the fuel pressure that your high performance, fuel injected vehicle will require. They utilize a special wave spring to maintain constant fuel pressure. Some models are universal fit, while others are designed for specific vehicle applications. The regulators are available for inline or fuel rail mount, with various psi ranges. Select the adjustable unit tailored to your driving needs.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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