Agreed....lets see the dip that you are referring to Mitch.
How do you correct the dip?
You can see it on this Graph with the link below through RPM5500-6300RPM, Being able to compare with the other pipes really helps to be able to fine tune.
As to how I am going to correct my pipe everyone will have to wait and see when the DCS-5 comes out, the fun part is going to be correcting the dip and not to loose the torque # I have in the Low and Midrange section.
http://www.suzukiquadracerhq.com/lt500r-exhaust/dyno-testing-my-dcs-pipe-on-my-87-lt500/