BBK hpipe with cats

I had one on my car for a couple years... It sounded great, and worked pretty well... When It came time to do smog, I switched it out with the stocker, so I wouldn't have any trouble... and I would always pass... Well, I just sold it a friend of mine, and he put it on, and passed smog about a week after the install.. so I would say as long as the cats are in good shape, you should have no problems..

its a good product.