I like the dynomax because of those quietness of it but I am gonna be running a 3" single exhaust pipe and I need a muffler with a 3" inlet but the dynomax only has a 2.5" inlet..My car is gonna be producing around 370hp so I need a good flowing muffler but I would like to stay quiet if I could...In your opinion what is the next quietest muffler after dynomax but it must have a 3" inlet..

 

My edelbrock rpm series cat-back convinced me. It is quieter than my stock muffler(86 T/A) without cat. ..But if you jump on it she ROARS!!! Not sure if you can just get the muffler though.. The 350 cat-back has the 3" I pipe also...Very nice quality