Fuelab 51502-3 Series EFI Fuel Pressure Regulator - 515

The Fuelab 51502-3 is a 515 Series adjustable fuel pressure regulator engineered for electronic fuel injection (EFI) systems demanding precision fuel delivery. This high-performance regulator combines robust construction with versatile design to accommodate a wide range of performance applications.

Key Features:

• Dual -6AN inlet ports and single -6AN return port configuration for flexible fuel system routing
• Accepts both port-style and non-port-style union fittings without interference
• Adjustable pressure range suitable for EFI applications up to 125 PSID
• Fine-pitch adjustment threads enable precise fuel pressure tuning
• CNC-machined billet aluminum body with Type II military-spec anodizing (MIL-A-8625)
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• 1/8 NPT gauge port with plug for external fuel pressure gauge installation
• 1/8 NPT pressure reference port with barbed fitting for vacuum/boost referencing
• Versatile mounting bracket with stainless steel hardware included
• Backed by Fuelab's 2-year limited warranty

The 515 Series regulator features a bottom-mounted return port design that simplifies plumbing in tight engine bays while maintaining clean aesthetics. The precision-machined internal components ensure consistent fuel pressure regulation under demanding conditions, making this regulator ideal for street performance, racing, and high-output EFI applications.