jwade,
I couple weeks ago I purchased a pair from Jeremy at ImagineAuto along with the Fabspeed bypass pipes and muffler setup. I did the install and it went very smoothly 1/2 day DIY on '02 S w/ 21K mi.
Weld quality looked good, O2's in the right locations kit connection allignment was reasonable and holes dead on. I have only put 100 miles on the setup but no CEL's and it felt like it pulled a little harder and sound is Excellent!
I would highly recommend this setup for any 968 S owner. Weight reduction of 20# I weighted everything...
I am in the process of installing the EVO intake kit and as expected it is a more challenging project than the exhaust but I'm almost there. The final upgrade is going to be a ECU S/W and I'm looking at options now, there are plenty I've found out...
Did a baseline stock dyno run a month ago and once the S/W is done I'll run it again, baseline (desnorkled) was 229.3 RWHP which I was happy with. Of course after my Dad's Z06 at 383 RWHP, it seemed a little weak...
Regards, Chris