I have a 2011 Toyota Matrix XR, will post pictures if anyone wants. Only things I've done to it are: Magnaflow Muffler, Res delete, Sub/Amp wiring (spliced the speaker wire behind factory deck), tinted windows (5% back windows / sunstrip, 15% front and rear facing window). Was wondering if there is anything I can do it to it to get more power out of it? Ive heard about the spark plugs and the CAI / SRI stories but none on a matrix.. Anything I can do to make it an overall better (looking or performing, I don't mind) car?