What mods have you done to your AT and what benifit did you get from them.

Only thing performance wise I've done is K&N drop in filter--I got slightly better gas mileage--t seemed to rev a little better--nothing measureable though. Its reususeable so its already paid for itself. I plan on adding the Racing beat intake and a catback--beyond that I've done all aesthetic mods. Custom 1/2" thick floor mats, custom two-tone leather, clear corners, and in the process of completing modest soundsystem. Infinity Kappa Components up front, Infinity Reference 3-ways in the back, 1 polk/momo 8" sub, .5 farad cap, and Alpine 5 channel to run the show.

K&N typhoon intake
and JIC ss exhaust

I have to say I dont feel anything it just sounds nice