WOT and 3000 rpm are very different. You have a similar set up to mine (number 87 on the chart) but I had two cats and a auger/silencer in mine at the time that made it very quiet. (98 dB) You don't want to use me as a typical setup.
A catted DP would probably fix your problem
Originally Posted by Rizzo314
WOOHOO!! I am the loudest! Both at idle and at 3000 rpms!
Your system should be called an amplifier, not a muffler.
Yes, his car really is that loud.