When I bought my S4, the previous owner gave me everything he had mazda-related. One was an aftermarket cat, which he said he picked up from japan (he was in the service). There is no brand on it or any sort of marking, but I was hoping some one on here may know.

 

No clue what brand but that isn't a cat. It is a presilencer of some sort. If you google what the inside of a cat looks like you will see what I mean. Looks nice though.

 

Thanks, yeah, I have no info about it at all, just taking up room. Think I could get $100 for it? haha.

 

It looks like a quality piece. Put it up in the classifieds and see what happens.