what are some performance mods i can do to my crossfire when i get it that won't void the warranty? i'm willing to spend between about $1,000 to $3,000... I've kinda looked into getting borla exhaust but i don't want something that will have loud droning at highway speeds... any ideas or suggestions? thanks!

 

Chip and tune.

 

anything can void your warranty, so that's out the window. but what he said, chip, tune, pulleys.