what do you guys know about Bosal in general? Good or bad experiences? The RevItUp cars with just the mufflers sounded awesome, I'm not a big muffler guy, but they had a real deep throaty sound, when you want it. At idle and and for normal driving, is sounds a little louder than normal, but the sweet sound came when you rev the engine over 4000 RPM. They are supposedly doing a full catback system for us, I guess mazda works with them, I believe Mazdaspeed uses thier exhaust systems. Any thoughts?