Fuelab 56503-1 Series Adjustable Fuel Pressure Regulator - 565

The Fuelab 565 Series Adjustable Fuel Pressure Regulator is engineered for extreme high-flow applications, featuring massive -10AN ports and a large return orifice for exceptional bypass capacity. This regulator is designed to handle the most demanding fuel systems, from high-horsepower carbureted setups to belt-driven EFI fuel pump applications.

Key Features:

• Maximum flow bypass capability exceeding 5 GPM at 5 PSI
• Large -10AN inlet and outlet ports for unrestricted flow
• Supports blow-through carbureted applications over 1,800 horsepower
• Ideal for EFI systems with belt-driven fuel pumps (flattened regulation slope)
• Adjustable design for precise fuel pressure tuning
• TBI and throttle body injection compatible
• Available in four pressure ranges covering 4-80 PSI applications
• Precision-machined construction for durability and reliability

The 565 Series delivers the same quality and performance features as Fuelab's popular 515/525 Series regulators, but with dramatically increased capacity to meet the demands of extreme performance engines. Whether you're running a high-boost turbocharged application or a large-displacement naturally aspirated engine, this regulator provides the flow capacity and adjustment range needed for optimal fuel system performance.