Fuelab 52503-2-L-L 525 Series Adjustable Fuel Pressure Regulator In-Line CARB

The Fuelab 525 Series Adjustable Fuel Pressure Regulator is engineered for high-performance fuel systems requiring precise pressure control in compact installations. This in-line configuration features a large seat design and CARB compliance, making it suitable for a wide range of carbureted and fuel-injected applications. The regulator accepts both port-style and non-port style union fittings without interference, providing maximum installation flexibility.

Key Features:

• In-line design with -6AN inlet and -6AN return port for easy installation in tight locations
• Large seat configuration supporting 1 PSID to 125 PSID operating range
• Fine thread pitch adjustment for precise pressure tuning
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• Billet aluminum construction with military-spec MIL-A-8625 Type II anodizing
• 1/8 NPT gauge port with plug for external pressure gauge monitoring
• 1/8 NPT pressure reference port with barbed fitting included
• Versatile mounting bracket with stainless steel hardware
• CARB compliant for street-legal applications
• Backed by 2-year limited manufacturer warranty

The 525 Series distinguishes itself with its return port positioned in-line with the inlet port rather than on the bottom, enabling installation in extremely confined engine compartments where traditional regulators won't fit. Precision-machined from billet aluminum and finished with durable anodizing, this regulator delivers reliable performance across various fuel types and demanding motorsports environments.