mingoman

My wife has a mbm 03 gmc reg cab 4.8 a4.Totally stock.

I have a reg cab 4.8 with a k&n cai and a magnaflow exhaust.
I can walk the dog pretty easy on her truck from 10 mph.
I am wondering, do you think that a transmission cooler would be a good investment for her truck?
Also, what kind of exhaust are you guys liking?
The cat back versions only. I am gonna give my exhaust to her and put a cat back on mine.

Also, what size clutch is in my truck????
I am thinking of puttng a good clutch in mine and want some reccomendations.
also, some mod ideas for hers would be nice