theres a 11 page post about this at v6accord.com
i have a one for v6. i havent installed it yet but going to wen i have time.
from what i have read from the posts it wont increase 20 hp. the gains for our cars are not dyno proven but from ppl's butt dyno they do work. it sounds kinda cool too.
here is a clip from one of the member
www.insomniakz.com/turbosoundrev.MPG
another
www.insomniakz.com/rev.mpg

links to the posts
http://www.v6accord.com/forums/showt...threadid=10924
installation guide
http://www.v6accord.com/forums/showt...threadid=14775