I couldn't decide on the Supertrapp or the Hushpower II when I upgraded. I went for the Hushpower because I was told the Supertrapp would be REALLY loud. I have seen the baffle kits you can add to a the exhaust tip so that may be an option for someone as well.

BTW, FYI, the guy that has been working on the incredible flying cars of the late '70's or '80's - the Skycar - he invented the Supertrapp muffler and sold the brand to pay for his Skycar work. I think he should have kept the Supertrapp!

I think I'll finally take the gamble and use a Supertrapp on my next "project"... thanks for the info!