[Stars1315]

So I've been looking into high flow cats, like 200 cell counts, and I'm wondering how high flow cats work for inspection?

There's no smell so that's good, and there's a cat, so I'm assuming it passes visual? What happens next? Do they just plug in the OBD2? And it passes? I don't like the smell so I don't want to lose the cats altogether and it would make life easy if the high flows will pass.

Also, does moving to high flows change the exhaust at all? I know catless does.

Thanks!!

edit: can anyone explain what the process is for putting in a catless dp as well? What is done to trick the sensors and pass emissions? Does the JB4 do it all? (assuming most people have this if they're going catless?) Essentially what I'm asking is hypothetically if I went catless what parts would I need/what work would I need done to pass emissions? Or does everyone just revert to stock before inspection?

[335NJ]

I passed with catless downpipes. Put MHD in stock map, or jb4 on 0, and use a DP FIX to mimic the o2 sensors proper value.

[MikeDNJBMW]

inspection does not know how high flow of a cat you have, as long as your check engine light is off after a drive cycle and you have 1 cat per pipe, for example true dual exhaust requires 1 cat per side.....

[Stars1315]

Originally Posted by 335NJ

I passed with catless downpipes. Put MHD in stock map, or jb4 on 0, and use a DP FIX to mimic the o2 sensors proper value.

What's the best fix to use with jb4? Do you leave it on all the time or just put it on for inspection?

[335NJ]

Originally Posted by mreto727

What's the best fix to use with jb4? Do you leave it on all the time or just put it on for inspection?

Vrsf and wedge sell them, they're all the same thing. Remove it after passing inspection.