DeatschWerks 6-0550-FRB DWR550c Adjustable Carb Fuel Pressure Regulator 6AN

Vehicle Fitment

Universal - not vehicle-specific. The DeatschWerks 6-0550-FRB DWR550c is a universal compact adjustable fuel pressure regulator designed for carbureted fuel systems. Compatible with any carbureted application requiring -6AN inlet and return fittings and a pressure range within the regulator's adjustment window. Suitable for street builds, race cars, hot rods, and any carbureted EFI-bypass setup using a mechanical or electric fuel pump delivering up to 550 GPH at 6 PSI.

Fitment Notes

• Inlet port: -6AN - requires -6AN fuel line at inlet; use appropriate fittings for your line size
• Return/outlet port: -6AN - a return line back to the fuel tank or surge tank is required for proper operation
• Gauge port: 1/8 in NPT - accepts a standard 1/8 NPT fuel pressure gauge (gauge sold separately)
• Vacuum reference port: 3/16 in - can be plumbed to intake manifold vacuum for vacuum-referenced pressure regulation, or capped for non-referenced (rising rate) use
• For carbureted applications only - not designed for EFI return-style systems operating above carbureted pressure ranges; for EFI applications see DeatschWerks EFI regulator lineup
• Pressure adjustment range and base pressure are set via the adjustment screw - verify target operating pressure against the flow chart before installation

Features

• Compact DWR550c body - smaller footprint than full-size regulators for easier installation in tight engine bays
• Fully adjustable pressure - dial in exact fuel pressure for your carburetor's needle and seat requirements
• High flow capacity: 79 GPH (300 LPH) @ 3 PSI, 145 GPH (550 LPH) @ 6 PSI, 198 GPH (750 LPH) @ 10 PSI - supports high-performance carbureted builds
• -6AN inlet and return ports - compatible with standard braided AN fuel lines
• 1/8 in NPT gauge port - easily add a mechanical or liquid-filled fuel pressure gauge
• 3/16 in vacuum reference port - supports both vacuum-referenced and non-referenced operation
• Machined from T6061 billet aluminum - lightweight, corrosion-resistant, and durable under continuous use
• Anodized black finish - resists fuel, oil, and heat while providing a clean underhood appearance
• Compatible with gasoline and ethanol-blended fuels including E85

Specifications

• Part Number: 6-0550-FRB
• Product Name: DWR550c Compact Adjustable Carburetor Fuel Pressure Regulator
• Color: Anodized Black
• Flow @ 3 PSI: 79 GPH / 300 LPH
• Flow @ 6 PSI: 145 GPH / 550 LPH
• Flow @ 10 PSI: 198 GPH / 750 LPH
• Inlet Port: -6AN
• Return Port: -6AN
• Gauge Port: 1/8 in NPT
• Vacuum Reference Port: 3/16 in
• Material: T6061 Billet Aluminum
• Finish: Anodized Black
• Application Type: Universal - Carbureted Fuel Systems
• Fuel Compatibility: Gasoline, E85, Ethanol blends

Included Components

• 1x DeatschWerks DWR550c Compact Adjustable Carburetor Fuel Pressure Regulator (Black)

Product Description

The DeatschWerks 6-0550-FRB is the DWR550c Compact Adjustable Carburetor Fuel Pressure Regulator in anodized black, designed for universal use on carbureted fuel systems. Its compact body makes it an easy fit in crowded engine bays where a full-size regulator won't work, while its -6AN inlet and return ports provide ample flow for high-performance carbureted builds - up to 145 GPH at 6 PSI and 198 GPH at 10 PSI.

Machined from T6061 billet aluminum, the DWR550c is built to handle the demands of race and street use alike. Pressure is fully adjustable to match your carburetor's specific fuel demand, and the 1/8 NPT gauge port makes it easy to monitor fuel pressure at any time. The 3/16 in vacuum reference port supports both vacuum-referenced and non-referenced operation. Compatible with gasoline and E85 ethanol blends. A tech data sheet is available on the DeatschWerks website for installation guidance and pressure setting reference.