Fuelab 51501 Series Adjustable Fuel Pressure Regulator; EFI Blue | 51501-3 RSX_2002-2006 Leave those little noise makers

Leave those little noise makers behind and upgrade to a system tunable to your WRX without triggering that dreaded check engine light and compromising daily drivability

9-301-1020 Vehicle-Specific Install Kit

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

giving you more control over your setup and sharper response under cornering

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

Fuelab 51501 Series Adjustable Fuel Pressure Regulator; EFI Blue | 51501-3 RSX_2002-2006 Leave those little noise makersUELAB 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