Part List
Tools Needed
Removal of Stock Fuel Lines
6. Remove the manifold pressure reference from the OEM FPR and remove the assembly from the engine bay. The factory FPR, dampers and hose assembly is no longer needed. Be careful as excess fuel may continue to
drain from the assembly.
IMPORTANT! Installing this kit will require custom tuning or utilizing an appropriate Stage Power Package map that includes this kit. Please consult with COBB or an authorized ProTuner in your area.
Installation of COBB Fuel Pressure Regulator Kit
The manfiold reference relocation allows for moving the fuel pressure regulator’s manifold pressure reference away from the #4 cylinder runner and into a plenum-based source, similar to the method used on the previous generation 2004-2007 STI. This helps prevent unwanted manifold pulsations from affecting the FPR as the plenum is a “common” area of the manifold that represents the average vacuum/boost of all cylinders rather than a singular cylinder.
Subaru Installation Instructions
Main Installation Instruction Repository for Subaru Parts
Link to Subaru Map Notes to see what map you should be on given the parts you've added