Fuelab 52503-5-S-T Series Adjustable Fuel Pressure Regulator TBI In-Line - 525

The Fuelab 525 Series Adjustable Fuel Pressure Regulator is designed for TBI (throttle body injection) applications requiring precise fuel pressure control in an in-line configuration. This regulator combines performance, flexibility, and compact design to meet the demands of modified and high-performance fuel systems.

Key Features:

• Adjustable pressure range suitable for TBI applications (1-125 PSID capability across 525 series)
• In-line design with -6AN inlet and -6AN return port positioned in-line (not bottom-mounted) for installation in tight engine bays
• Compatible with multiple fuel types: gasoline, diesel, methanol, and ethanol
• CNC-machined billet aluminum construction with Type II anodizing per military spec MIL-A-8625
• Fine thread pitch adjustment for precise pressure tuning
• 1/8 NPT gauge port with plug for external pressure gauge monitoring
• 1/8 NPT pressure reference port with barbed fitting included
• Accepts both port-style and non-port-style union fittings without interference
• Includes versatile mounting bracket with stainless steel hardware
• Backed by Fuelab's 2-year limited warranty

The 525 Series regulator's unique in-line return port configuration eliminates clearance issues common with bottom-return designs, making it ideal for cramped engine compartments and custom fuel system installations.