Rep Power: 0

OK heres the deal, i hit a curb really hard broke a whole bunch of stuff.... alex, strut, pretty much the whole left front tire. i had this fixed at a shop and it cost me roughly 1600.00. anyways, when i start the car it sounds like i have a cat back exaust. and it revs really funny... is it the exaust? i was going to take it to another shop and they said that they will have to charge me 85.00 just to look at it. but if the exaust just came loose fron me nailing the curb then i think i can fix if for like nothing. well any help on this will be appreciated