Fuelab 51505-5-L-E Series EFI Fuel Pressure Regulator Large Seat - 515

The Fuelab 51505-5-L-E is a 515 Series adjustable fuel pressure regulator engineered for high-performance EFI applications. Featuring a large seat design, this regulator delivers precise fuel pressure control for demanding fuel-injected engines while offering exceptional flexibility in plumbing configurations.

Key Features:

• Dual -6AN inlet ports and single -6AN return port (bottom-mounted) for versatile fuel system routing
• EFI pressure range up to 125 PSID for demanding fuel injection systems
• Large seat design for improved flow capacity
• Accepts both port-style and non-port style union fittings without interference
• Fine-pitch adjustment threads enable precise pressure tuning
• 1/8 NPT gauge port with plug for external pressure monitoring
• 1/8 NPT pressure reference port with barbed fitting for manifold vacuum connection
• Multi-fuel compatible: gasoline, diesel, methanol, and ethanol
• CNC-machined billet aluminum construction with Type II anodizing per MIL-A-8625 specification
• Includes versatile mounting bracket with stainless steel hardware

Designed for performance enthusiasts who demand precision and reliability, the Fuelab 515 Series regulator combines race-proven engineering with user-friendly adjustability. The bottom-mounted return port simplifies plumbing in tight engine bays, while the dual inlet configuration provides installation flexibility. Backed by Fuelab's 2-year limited warranty.