Fuelab 51501-4 Series EFI Fuel Pressure Regulator - 515 6AN

The Fuelab 515 Series Adjustable Fuel Pressure Regulator is engineered for high-performance EFI applications requiring precise fuel delivery control. This billet aluminum regulator supports fuel pressures up to 125 PSID, making it ideal for street and racing fuel-injected engines. The versatile design accepts both port-style and non-port-style union fittings without interference, providing maximum installation flexibility.

Key Features:

• Dual -6AN inlet ports and single -6AN bottom-mounted return port for clean installation
• Fine thread pitch adjustment mechanism for precise pressure tuning
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• Military-spec Type II anodized billet aluminum construction (MIL-A-8625)
• 1/8 NPT gauge port with plug for external pressure monitoring
• 1/8 NPT pressure reference port with barbed fitting for manifold vacuum
• Includes versatile mounting bracket and stainless steel hardware
• Backed by 2-year limited manufacturer warranty

This regulator is designed for EFI systems where consistent fuel pressure is critical for proper injector performance and engine tuning. The bottom-mounted return port configuration helps simplify plumbing in tight engine compartments while the dual inlet ports provide installation flexibility.