ok, these are not an axle back kit like most, but has anybody "custom" made these to fit their 05+ GT? if so, how does it sound? i know a muffler shop that builds exhaust systems for race cars close by, and they can mandrel bend pipe, and make me an actual axle back bolt on kit with these mufflers for less than most kits on the market. wondering if someone has done this already??? if so, post up pics and sound clips if you have any...