FWIW...I went with Cherry Bomb Salute mufflers for some of your same reasons. I put the Demon on the street some and wanted to be "legal" so hung them with turndowns just ahead of the axle. They are somewhat loud but they should be on a low-mid 11 sec car! I think you car is faster than that so you probably still want it to have some "character" anyway. One of many, many options I looked at. 3 collector bolts and 1 rear hanger bolt on each side and the exhaust system is off and car is ready for the track.
