I considered Super Trapps - that is until I heard a few cars with them. Most, to me, anyhow, don't sound nice and burbbly (new word) just a somewhat muted blatt. Not even sure about my 3 chamber Flowmasters yet until I get a few miles on them. They seem to drone even driving up and down the driveway and around the block. I do like Smithy's:D but hung outside like a 'bucket.........