Blue -6 An S-max Universal Fuel Pressure Regulator With Dual Port Fpr Turbo on 2040-parts.com

You need something to control fuel pressure with reference to boost when turbo charging a car.  Basically a boost-dependent fuel pressure regulator (FPR) takes the place of the OEM FPR, but is adjustable and can be referenced to a pressurized manifold as opposed to a vacuum-0 psi manifold pressure (naturally aspirated).  This is a must have item for turbo applications. This FPR requires connection to the rail and return line with separate fittings, lines, and hoses.

S-Max's Fuel Pressure regulators are built from billet aluminum and are safe for use with alternative fuels like E85. The -6 AN model is geared towards high performance EFI systems and features two -6 AN/ORB inlet ports and a single -6 AN/ORB return. It has a standard 1:1 rising rate.

• Universal Boost Dependent Fuel Pressure Regulator
• E85 Compatible
• For all return style fuel systems with 2 fuel lines. Can also be used as a single line.
• Can also be used to convert a single /dead head system to to a dual system
  
• Pressure Rate adjustable  
• 1:1 Rate with  Boost  / Vacuum reference port
• Made from billet aluminum
• 1 3/4" Base Diameter
• 2 3/4" Tall
• Dual -6 ORB/AN Feed Ports (Can be used for dual rail, plugged, or for a pressure gauge)
• -6 ORB/ AN Return Port