its a early surpass silencer on a newer engine, the pipe is new just the silencer is the older style.

I had a older engine and I wanted the shorter pipe, when I sold the older one I shipped off the longer new one to the buyer, here is the regular pipe http://www3.towerhobbies.com/cgi-bin...?&I=LXCP62&P=Z its just a little longer than the older version.

here is another option pitts style for a 4stroke little pricey but has a clean look to it http://www3.towerhobbies.com/cgi-bin...?&I=LXVNM2&P=Z