Hi guys, I have a couple of questions and I would appreciate any inpute you guys can give me. I have a 2003 A6 4.2 and I have lowered it with the H&R springs apx 1.5 inch in front and 1 inch in back. I am still using the original 17 inch wheels and tires with the 255/45/17. I want to replace the wheels and tires to 19s in the back with 255 or 265/30/19s and the front with 245/35/18 or 235/35/18. I forgot to mention I also have aftermarket front and rear sway bars on the car. Do you think thats a good idea or should I just go with 255/30/19 all the way around? I am also afraid if it is going to rub in front.
My second question is has anyone used the transmission chip for their car and is there any for the 2003 a6 4.2 and is it worth the money? I also found a couple of other ideas that i will post soon along with the websites attached so you guys can look into it.

Thanks for your input

Ramses