So my car is turning 6 years old so its smog time, just thought I'd share because there seemed to be a lack of info when I looked. I was intrigued by what it would actually take to pass, so I took an iterative approach.
Turbo XS TBE with Hi flow CATCO CAT
Stage 2 protune flashed with CObb AP V2
CX RACING TMIC with blue hoses
FLAT PANEL FILTER
I had no "Smog Guy", just chose the places I went to off of google on a criteria of proximity and reviews. First place I went was a "NO pass No pay" place which was awesome. Second place I went was a franchise chain smog joint.
Drove the car in with everything on it, Stage 2 protune.
*Failed visual, but they were cool about it. They were fine with the TMIC (in fact they never mentioned it) and the blue hoses, but wanted the stock downpipe on even though my DP had a hi flow CAT.
Stock exhaust, but protuned stage 2 ROM flashed still.
*Passed Idle emissions, passed function, failed 2500 RPM test by a lot. Max CO allowable at 2500 RPM is 1.0 PPM and as measured mine was at 1.5 PPM. My protune map keeps the AFR's off idle in the 10.x-11.0 range.
Stock exhaust, Married AP V2 with Cobbs "Married Stock Mode v3.0" map and a different smog place (first place was closed)
Passed Visual, Function and Emissions.
* It is important to reflash your car several days before your smog check otherwise the ECU will not go through all the computer diagnostics and you will fail the "Function" test.
* First thing both places did was grab a flash light and a mirror and pour over the exhaust system from the turbo back. I had even painted my whole system with the aluminized paint 6 years ago so it had the correct patina and looked stock, but no luck.
My personal feeling is that my car would have passed the tail pipe emissions with the "married stock mode v3.0 map" and my aftermarket TBE w/CAT, which would have saved 4 hours of hardware removal and re-installation time, had I found a place that was more lenient on the visual portion.