If the ano is wearing off and corroding I would just brush it down real good to get it all off and paint it with BBQ grill high temp paint. Cheaper than buying a new one. Or the THS pipe for the Maxx works great.
It is corroding where it meets the header. the outer casing of the pipe is.. I looked on traxxas's website and I can get a stock pipe for $15. Is it worth the money for a better one?