I'm sure by the time you decide to upgrade your stock cats, most of you probably have a downpipe and a cat-back. So, for those of you who have SMB metallic substrates, do you get creep at all on the stock wastegate port size?

 

I don't have an SMB, but i do have a Random Technologies metal substrate cat in my mid pipe. It helped tremendously in controlling boost and eliminating creep.

 

Off topic, but did you keep your air pump bung on there?

 

Wow, no one else has a metallic cat?