i just saw the bit of info on the power commander. i already have the efi muffler and the k&n filter - just wondering for the $400 outlay which isn't much for the power commander unit - do you really get any extra power to the rear wheel.
I'm wondering the same thing. Is this thing really needed? It seems that plenty of people have changed exhaust & air filters from the stock setup, without the PCV installed, and are running fine.
In summary, no harm will come from keeping the existing ECU as it is. It compensates better for such changes than a carburettor can. But a Power Commander should help release the potential performance gains from a new air filter and exhaust.