Subaru WRX Forum banner
comparisons
1-1 of 1 Results
  1. Engine Modifications
    Hi guys, proud owner of 09 a WRX, three quick exhaust questions: 1. I know people talk about intakes causing the engines to run lean, as a result of the MAF sensor. Do exhausts cause lean conditions? Asking in regards to an untuned car, with no other mods. 2. Seems as if no real power...
1-1 of 1 Results
Top