Lowered 07's
Who did the install? It seems that something was done incorrectly. I have no such noise from mine. You may want to check everything including the catback to make sure everything is tight. Good luck..
Thanks for all your guys help i lowered 6 cars in my day and never had a headache like this it sounds like somthing was installed wrong the sound comming from the rear sounds as if its bottom out but its not low enough to do that i know when i go to the shop tomorrow they will say if it does not come with the truck it should not be on it and blame after market.






