First thing , the car will have a tune here shortly but I was planning on putting some pacesetter long tube headers on tonight and going on a club run Sunday but the car want be at the shop to tune it until sometime next week. I plan on then putting the cold air with new fuel injectors on but wanted to try the exhaust this weekend, plus putting it on takes time so having it done before the week starts will help. Just wondering if anyone has ever put long tubes on and ran an 05+ safely with no tune to adjust for the change. I know any change in the air going in requires a tune but not sure about air going out. Dont know if the on board computer will compansate and adjust for the change. Any advice would be appreciated.