I recently purchased a 2006 bmw 325i (not sport). I am looking to do some mods to it such as larger rims, exhaust system, and an air intake. What else would you reccomend? What is the largest size rims that will fit my model? Which exhaust system would you reccomend? Which air intake should I get? Also keep in mind I'm not trying to spend an insane amount of money. Thanks! Also links would be great