This is the pipe and header I`m using:
http://www3.towerhobbies.com/cgi-bin...?&I=LXMMM0&P=0
I used a piece of alum. tube between the pipe and header, but now I use only the stock header length and I think it looks kinda short, but maybe I can shorten it further??
For comparising my freinds new XLS .15 turns the same prop at "only" 15600 rpm so I have an increase of 3000 rpm over stock engine