Originally Posted by
Reaper1
Maybe I've just been out of 3.0's too long, but since when are there "off-the-shelf" cams available outside of RPW? I think all the people I know of that have non-stock (meaning non-Mitsubishi) cams have all been custom re-grinds.
If the engine was turned around 180* (belts on the passenger side), then there is an option for the manifolds and cross-over pipe to adapt a turbo. Since the engine is turned the other way in a 3Si, I'm not 100% that they would work. Brent (Ondonti) would probably be your best resource for this information, besides the guy that makes those pipes (I think it was Kelly Mulhern).
I do know that there have been a couple of people that have adapted aftermarket headers for other applications to these engines in the manner you are talking about.
It sounds like you have a nice build. As long as the tune is good and the turbo can support it, we know 500+ is completely possible (that was done with a partially blown headgasket IIRC).