Jabba sport claim this, might be worthasking a few people with thier chips what they are getting.
I got revo and rolling roaded @ 220bhp.  Also with revo everything is controled by obd2 port with a remote dongle, if you need to switch it off to take to the stealers or sumit then it is totally undetectable.
Try and get some performance figures off people and se how you go.
Jabba, Amd and revo have all got good reputations anyway