Originally Posted by esfourteen

GTM stg 1 sc won't get you to 450whp, stage 2 will but it's still not done yet. TT kit on 6psi will do 450whp for sure. Stillen kit will do 450whp with some tweaks but I won't go there. A brand new SC kit is a bit cheaper (1-2k) and easier to install (less labor).

As for which will last longer, I suppose thats debatable. Some claim that the added stress that a belt driven SC adds is harder on the engine than the swift kick in the crank of torque that the TT provides. I believe that although the SC adds some extra work for the engine, the linear power delivery is much less harsh on the internals and will last longer.