Ive never go the dont do it it will void your warranty. When i bought my car the sales man was like telling me about a few of the guys that also bought 04 gtp's at the dealership and all the stuff they had already done. i actually asked the dealer if changing wheels exhaust and stuff wouled harm my warranty and i got this. any non factory wheel will void brake warranty in the first 12k miles. darn i have 20k on my car now. exhaust would void exhaust warranty. darn i wouldnt expect the dealership to warranty an aftermarket item.