I found on the internet , sites selling modules that claim to make more power (10hp+) . Did any one try any of these stuff ? do they work ?

See some examples

Next Level Racing G-Box
http://www.nextlevelracing.com/stage1.htm

Next Level Racing Tri-Phase
http://www.nextlevelracing.com/Triphase.htm

Jet Perfomance Chips
http://www.jetchip.com/

 

from what I remember jet chips make the car run real rich

that's all I have any experience with, or actually what I heard second hand

Nick

 

wouldnt this be the same as removing the o2 sensor?