For those of you who just had smog done, did they seem to care about the midpipe? I just uninstalled my cobb and threw on my stock parts except for exhaust and was wondering if I should be ok. I still have stock DPs
As far as the visual inspection - it'll vary by station. They may look for the obvious like aftermarket intake, check for cats, etc - while some stations are pretty lax about visual.
All stations will care about OBD2 test - so whatever aftermarket parts are left installed (midpipe, exhaust, DP, etc) - just make sure - no CEL/MILs, I/M monitors ready and no P-DTCs (for 2010 and newer GTRs).