[rmay635703]

Antique 2 way cats like a diesel VW runs can’t foul and are cheap

While running lean a 2 way cat is the best way to decrease VOC, CO, particulate, just not NOx


Erm thinking about it further your running a pollution controlled car with pcv and exhaust gas intake intact, that chart is invalid with an operational pcv and egr

In other words My guess is your stock cat will live a long life and you should log the pollution after your tune, results will likely surprise you