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No idea on brand names, sorry. My first set were stock gutted ones and my second set were bought from a friend of a friend.
Yes, they're illegal. For those knowing the benefits you'll gain, we find a way to look past our guilt :-)
Depends on their inspection level...visually they likely wouldn't pass since there's straight piping vs a section that has the catalytic material. If they're not doing visual inspections, then you're better off.
Yes, you're removing an emissions item completely. The best way to remove the CEL is to get a flash tune from HCP or ESS....something you'd wanna do regardless because it'll be the biggest power adder next to different turbos.
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