Quote:
Originally Posted by c4ss
Following up here:
I finally got around to getting to an inspection station to test out this method. My car is a 2018 F80 ZCP running stage II bootmod3 with VRSF catless downpipes and stock ZCP exhaust. I placed the defoulers exactly like the OP instructed, and flashed stock tune (no lock). I drove around for about 25 or so miles after and then hooked up to a local shop inspection station OBDII.
It worked. Everything was shown as "ready/pass". 
Got my sticker and I'm good for a year without putting stock downpipes back on.
Thanks to OP for this thread. Saved me a lot of aggravation. I'll be putting these on every year now.  |
Glad it worked man!! Trust me I was in the same boat and I couldn’t find ANYTHING on here showing how to pass with catless dp besides using an o2 sim which is like 120 and you have 2 downstream o2 sensors so 240 bucks just to pass emissions? F*ck that lol