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The Fuelab 515 Carb Adjustable FPR 4-12 PSI (2) -6AN In (1) -6AN Return - Black controls fuel pressure in a correctly engineered carbureted, EFI, or diesel fuel system. Confirm pressure range, inlet and return ports, bypass strategy, flow demand, fuel compatibility, and reference requirements before ordering.
Key Features
- Universal CARB Adjustable Fuel Pressure Regulator, 4-12 psi, (2) -6AN Inlets, (1) -6AN Return.
Fitment
Universal specification-matched fuel-system component. No year-make-model claim is assigned. Confirm the exact dimensions, interfaces, pressure, flow, fuel, electrical, and system requirements.
Specifications
| Brand | Fuelab |
|---|---|
| Manufacturer Part Number | 51504-1 |
| Product Type | Fuel Pressure Regulators |
| Condition | New |
| Configuration | 515 Carb Adjustable FPR 4-12 PSI (2) -6AN In (1) -6AN Return - Black |
| Pressure Range | 4-12 PSI |
| Port Size | -6AN |
| Finish | Black |
What's Included
One new Fuelab fuel pressure regulator in the exact configuration and quantity stated. Supporting pumps, filters, regulators, lines, fittings, seals, wiring, controllers, brackets, fluids, and vehicle installation kits are included only when expressly listed.
About Fuelab
Fuelab develops high-performance fuel pumps, pressure regulators, filters, surge tanks, plumbing, and supporting controls for properly engineered automotive fuel systems.
Related Parts
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- Fuelab 515 EFI Adjustable FPR 25-90 PSI (2) -6AN In (1) -6AN Return - Red
- Shop all Fuelab products
Frequently Asked Questions
Is the 515 Carb Adjustable FPR 4-12 PSI (2) -6AN In (1) -6AN Return - Black for carbureted, EFI, or diesel pressure?
Use only the pressure range and seat configuration stated for this exact part. Carbureted, EFI, and diesel systems have different pressure and flow requirements.
Does this regulator require a return line?
That depends on the exact regulator and fuel-system design. Match the feed, return, bypass, reference, pump, and port layout to Fuelab's current diagram.
Which fittings and line sizes should I use?
Match each port's documented thread and seal type, then size the feed and return lines for required flow without introducing a restriction.
Installation Instructions
Relieve fuel pressure and disconnect vehicle power before service. Work in a ventilated area away from ignition sources. Follow Fuelab's current instructions for the exact part number, use compatible lines, fittings, seals, wiring, filters, regulator, mounting hardware, and torque values, then prime and leak-test the complete system before starting the engine.
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