Here's a vid of my homie on Guam who is running this exhaust....As far as Dyno numbers are concerned we wouldn't know since we no longer have an operative "Dyno Shop" here on Guam anymore....
Hit him up on the forum since he's a member (Simota)....I know that he did tons of research on the exhaust before he bought it and he will be able to give you some insight...I do know that his 1/4 mile time decreased a bit when he had this exhaust installed.