So my car is back from DEFCON 2 and Stoptech stg II install.. also 42dd dp cat section...
As for the cat section replacing the test pipe, well, the sound is noticeably different. It seems to have lost it's teeth, so to speak. Now don't get me wrong, it still sounds good, and much better than it did when I had the OEM downpipe, but it isn't quite the howling monster that it was with the test pipe in there. I need to be able to run it up to 6k to really get a feel for it, both in terms of performance and sound. I'll let you guys know what I think after I get done.
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