Hi to you all once again. I need your humble advice once more. I was at the track recently and was insanely discouraged because I was running a whole second slower last year (it's too embarrassing to say). So now I'm looking into going stage 1 (filter and access port) to hopefully lower my 1/4 mile time. I'm sure part of my problem is having an automatic and my car is an 02' so it has a "glassbox" tranny . I am wondering if going stage 1 will be worth it or if it will harm anything? Can the same access port I used for my car be used on other WRX, etc in the future? Is stage 2 out of the question?
Other things to mention: I have cat-back exhaust with 2.5 inch piping, I'm thinking of going with 3" before tuning and staging up. I also already have a panel aftermarket filter.
Any advice or help would be much appreciated. Thank you all.