This is my first time leasing a car, and i am a lil hesitant to mod it, even though I will probably buy it at the end of the lease. BUT, for mods like exhaust, where there is cutting of the pipes underneath the car...lets say you get an aftermarket exhaust, and pipes are cut. Then before you return the car at the end of the lease, with the stock exhaust rewelded, will the dealer look underneath and charge you for a new stock exhaust after seeing it had been messed with?