Fuelab 52503-2-S-T Series Adjustable Fuel Pressure Regulator TBI In-Line - 525

The Fuelab 525 Series Adjustable Fuel Pressure Regulator is engineered for performance and versatility in TBI (Throttle Body Injection) applications. This in-line regulator features a unique design with the return port positioned in-line with the inlet port rather than on the bottom, enabling easy installation in extremely tight engine bay locations where space is at a premium.

Key Features:

• -6AN inlet and -6AN return port positioned in-line for compact installation
• Adjustable pressure range suitable for TBI applications (supports 1-125 PSID across 525 Series)
• Fine thread pitch allows precise pressure adjustment
• Accepts both port style and non-port style union fittings without interference
• Billet aluminum construction with Type II anodizing per military spec MIL-A-8625
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• 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
• Backed by 2-year limited warranty

This regulator is ideal for TBI fuel systems requiring precise, reliable fuel pressure control in space-constrained installations. The military-grade anodized finish ensures durability and corrosion resistance, while the broad fuel compatibility makes it suitable for various performance applications.