Sorry man I don't ,reason being is I dropped the car off to my guy and told him to make it sound good and that is exactly what he did...imho!
I know he told me they were another brand that flowmaster makes if there is even such a thing.I would ask him but unfortunately he passed away about three months after he put them on for me...in all honesty I think they may be flowtechs or maybe even dynomax but I really can't be sure.