Tinker, I think the loss of low end torque is exactly what is to be expected from less back pressure. If you look at dyno results that is predictable, loss of low end torque but some gain in high RPM horsepower. Again, I am certainly no expert here, just have been reading a lot. If you want more power I think you will need to re-map the ECU to throw in more fuel, this combined with the more open exhaust should give some power gains. Check out this site:
Products: Performance and Enhancement Products for your Porsche
Pedro makes a "techno power 2" kit which includes remapping the ECU, I have met Pedro and he is a really nice and trustworthy guy, highly respected everywhere. I don't have the power kit (yet) but am considering purchaing it along with deleting the secondary cats.
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