in response to the PM: if you remove your right side muffler and look up the pipe, you will see a metal tab sticking down at the intersection of the crossover that looks like it just wasnt cut right...its an on-purpose baffle, that directs more exhaust flow into the crossover pipe..
on another forum, dyno showed a 3 hp increase from removing it...
also, i took my SE pipe appart and removed some of the restriction, so that the right side flows better..(the 07s have more restriction on the right side to help divert the flow) .this in effect, makes a 2 into 1 exhaust from the factory system....