At that price, I think I could get used to the additional noise.😖 What do ear plugs cost in Canada?
Just a thought...make sure that the exhaust hasn't gotten pushed up to where it is grounding out on the body or the metal of one of the hangers. That can transmit a lot of noise into the interior of the car. Seems strange that this dent would effect the noise level coming out the tail pipe. Get under there and shake the exhaust around on the hangers to see if it is making metal to metal contact anywhere.