Bloodangel:
MT2 comes with an aluminum header.
I would go with an Asscociated pipe:
http://www2.towerhobbies.com/cgi-bin...?&I=LX3428&P=7
The one I posted is purple, but any of theirs are a good choice.
I have a CVEC on mine.
I think that is the right engine, I have a HPI 18SS.