Fuelab 52503-4-L-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 throttle body injection (TBI) applications. This in-line regulator features a large seat design and accepts both port style and non-port style union fittings without interference, providing maximum installation flexibility.

Key Features:

• In-line configuration with -6AN inlet and -6AN return port for easy installation in tight spaces
• Return port positioned in-line with inlet port rather than on the bottom
• Fine thread pitch adjustment for precise pressure tuning
• Compatible with gasoline, diesel, methanol, and ethanol fuels
• Billet aluminum construction with Type II anodizing per MIL-A-8625 military specification
• 1/8 NPT gauge port with plug for external pressure gauge monitoring
• 1/8 NPT pressure reference port with barbed fitting included
• Includes versatile mounting bracket and stainless steel hardware
• Backed by 2-year limited warranty

This large seat regulator supports applications requiring precise fuel pressure control, with the 525 Series range covering carbureted systems as low as 1 PSID up to fuel injected applications up to 125 PSID. The compact in-line design makes it ideal for installations where space is at a premium.