[MaSnaka]

from classic chambered's website under testimonials...

"I ran them in both directions they sounded better in backwards, a nicer deeper sound, and they weren't much louder. We tested them inside the shop with a Db meter, It was a more controlled environment. Readings with stock mufflers were 98 Db @ 2000rpm 110Db @ 3000rpm 106Db @ 4000rpm. With the power stix in the right way readings were 103Db @ 2000rpm 108Db @3000rpm&am p;am p;nb sp; 111 @4000rpm with them in backwards they were they were 106Db @ 2000rpm 107Db @ 3000rpm 109Db @ 4000rpm. You have to remember we were inside a shop, When we moved it outside it was a lot quieter."

Backwards seemed quieter by 2 db at 4000rpms according to that comparison. I really don't think 2 db would make a difference. They would be loud either way at 109 db vs. 111 db.

John