Which is the best muffler?

I don't think the above answer is very good. If you DON'T want a loud muffler then definately don't go with a greddy. My friend's teacher had a Twin Turbo Supra and he put a HKS full turbo exhaust system (cat-back) and it sounded SOOOOOOO smooth and very quiet. This is a great exhaust for turbo cars because you want people to hear your turbo and the blowoff valve on your intercooler. This muffler is not fully stainless steel and would look rediculous on your car though. I would go with a Borla exhaust if I were looking for quiet but I'm not sure if Borla is any more smooth than the exhausts listed above. Just more quiet.  more