Hi all, I own a '03 corolla hatch and have a few questions on twin loop mufflers. Has anyone got a twin loop muffler put on thier corolla? Do these mufflers actually fit on our cars? What brands do this came in and how much does it cost? And last but not least --- I don't want the muffler to sound too loud, so are these the quietest after market(besides the stock mufflers) to have? Thanks. Rainman.