Well that answer works for me lol.... It just seems weird that it started after the TMIC install, but it doesn't seem to have any negative effects on the power delivery of the turbo in the higher rpm range.
Boosted, to answer your question so far so good. The cat back and intake didn't really give me anything according to the butt dyno, but the TMIC did, even without any tuning so far. I know I've gained over the whole powerband- quicker spool ( I get full boost around 3300 or so), and definitely more upper rpm punch compared to the stock TMIC. It was really noticeable on the highway, 5th gear really pulls harder and I attribute that to the better flowing design of the Perrin TMIC.
In the near future I'll have the COBB DP and a road or dyno tune. I may also have PnP exhaust manifolds and crosspipe from Grimmspeed. I want to open the pre-turbo flow a bit, and I want to keep my boxer sound. From what I hear you get similar gains from the PnP setup compared to equal length headers for about half the price. Plus you keep the nice thick manifolds compared to thin walled aftermarket headers. This can all be expected in 2-3 months so I'll keep ya'll updated. My goal is 300 awhp/ 315-330 TQ and still is, but at my elevation (4200') and only having 91 octane, it'll be tough. If I was back home in Detroit at 600' and 93 octane I'd be golden.