Fuelab 51505-6-L-L Series Adjustable Fuel Pressure Regulator - 515 6AN

The Fuelab 51505-6-L-L is a 515 Series adjustable fuel pressure regulator engineered for high-performance fuel systems. Featuring a large seat design with CARB certification, this regulator delivers exceptional flow capacity and precise pressure control for demanding applications. The versatile design accepts both port-style and non-port-style union fittings without interference, making installation straightforward across various fuel system configurations.

Key Features:

• Dual -6AN inlet ports with single -6AN bottom-mounted return port for flexible plumbing options
• Large seat configuration for maximum flow capacity
• Adjustable pressure range supporting carbureted applications from 1 PSID to fuel-injected systems up to 125 PSID
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• Precision-machined billet aluminum construction with Type II military-spec anodizing (MIL-A-8625)
• Fine-pitch adjustment threads for 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 reference
• Includes versatile mounting bracket with stainless steel hardware
• CARB-compliant for legal use in emissions-regulated areas
• Backed by Fuelab's 2-year limited warranty

This regulator's premium construction and wide pressure adjustment range make it ideal for street performance, racing, and custom fuel system builds requiring reliable, repeatable fuel pressure control.