I just picked up a 2010 GTS Sportback M/T. It's my daily driver, so I can't go too crazy, but I have some questions that I was hoping I could get some clarification on.
1. I was thinking about putting a cat back on, but it seems after reading a bunch of posts that an axel back would pretty much accomplish the same thing. I can only find 2 manufacturers: Injen and Greddy. Are there any others? Does WORKS make something?

2. I was going to put in the INJEN CAI, it seems people are pretty happy with them, is that a direct swap out, or are there wires and stuff you have to mess with? If so, are there any other CAI's that don't require wire splicing (just worried about warranty here)

3. Lowering these cars, it seems there is problems with just using springs. In my SVT Focus and my EVO, when I lowered them I got new struts to accomodate for the lowering. Do any manufacturers offer them for the GTS (kind of like the H and R Cup Kits)?

4. Will anything that works on the regular lancer GTS work in the Sportback?

Any and all help is very much appreciated.

Thanks.