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Has anyone here measured the back pressure on the stock exhaust? I tested my car today and was surprised by the results. 14 psi by redline. Dropping the cat back yielded the same result, so it's in the downpipe. Considering the expansion ratio this turbine must run, that seems like too much back...

I thought I would share my catch can project for people that are interested in this sort of thing. There are kits that can be bought, but I had something else in mind for this car. These particular catch cans (JCS Fabrication) I've been using on DSMs for many years now, and I like to stick with...

First, a brief history on the car. Kait bought this thing in early summer. It's auto, premium, no PP. Stock my best was a 13.7 at ~101, Kait also went 13.7 but a touch quicker (wtf). With the Cobb tune it went 13.5 at 104. I got the software from Cobb and Kait got it down to 12.7 at 108, still...