Originally Posted by 135Pats
Sure you can, you'd just need to swap out to the OE downpipes for testing...Granted that is neither cheap nor convinient, it would probably come down to labor costs in your country, and how often you have to pass emissions testing.
I was thinking of going the catted downpipe route and people haven't passed emissions this way either. So I said screw it, do my emissions before Feb 16th, install the catless DPs and not worry about it for 2 years.
OP, you have to remember that you aren't guaranteed to pass emissions with an aftermarket catted DP, possibility of still failing emissions