Perrin Air Oil Separator AOS for 2015-2021 WRX (PSP-ENG-609) *Discontinued* Enkei This button also allows users

This button also allows users to cleat DTCs once the problem is resolved

MAF setup (stock) or speed density

this tank will have no problem matching the style of your engine bay

the new slotted bolt holes allow for a much easier install as the shield can be dropped into place and situated without needing to squeeze your hand into tiny engine bay gaps to blindly insert tiny bolts at the same time

Mitsubishi 6G72

Perrin Air Oil Separator AOS for 2015-2021 WRX (PSP-ENG-609) *Discontinued* Enkei This button also allows usersPerrin air oil separator for 2015 2021 Subaru WRX. An AOS traps oil from the crankcase vents before it enters the intake, reduces carbon build up, increases intercooler efficiency, which reduces the chance of performance robbing detonation. Available in black, red or neon yellow. Vehicle Fitment: 2015 2021 Subaru WRX Fits with TMIC or FMIC Installation Guide PDF More Info: The Perrin Air Oil Separator is not a catch can. Catch cans capture engine blow