Thanks again.

I've also ordered, from Tower Hobbies, the MT2 aluminium tuned pipe for now. I know it's probably not one of the best, but it'll do for now instead of the stock pipe. i'll keep the same manifold for now, too, but can you recommend a decent manifold for the O.S that will fit with the MT2 tuned pipe (I'm assuming they are more or less universal sizes?)