Fuelab 51501 Series Adjustable Fuel Pressure Regulator; EFI Blue | 51501-3 RSX_2002-2006 This is the same thread

This is the same thread pitch used in -4AN (ORB=O-Ring Boss)

to suite any application

9-301-1020 Vehicle-Specific Install Kit

V2 FR-SPEC Highlights:

and nose dive under braking—resulting in sharper handling and improved overall stability

Fuelab 51501 Series Adjustable Fuel Pressure Regulator; EFI Blue | 51501-3 RSX_2002-2006 This is the same threadUELAB 515 Series Fuel Pressure Regulators are designed with performance and flexibility in mind. They accept port style and non port style union fittings without interference. Several configurations are available, supporting carbureted applications as low as 1 PSID to fuel injected applications up to 125 PSID. The 515 Series Fuel Pressure Regulator has a 6AN return port located on the bottom. Regulator Features Two 6AN or 10AN inlet ports and one 6AN