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Old 05-14-2019, 09:11 AM   #4 (permalink)
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rmay635703's Avatar
Join Date: Jun 2008
Location: Somewhere in WI
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Silver - '10 Chevy Cobalt XFE
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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

Last edited by rmay635703; 05-14-2019 at 09:25 AM..
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