i know this subject has been hashed and rehashed but i still need your opinion. has anyone used and aerospeed straight thru muffler? not the tuneable stuff! i know stillen and greddy are good, as well as courtesy's. the note i'm lookin for is similar to the camaro's and grand am's.(can't believe i said that) you know, that low rumbly deep note, yet quiet. not too quiet but not as loud as a tyoical fart can.