As far as chambered exhaust systems go, other than SW, they seem to be a bit scarce. Maybe a custom made system? I have listened to the Borla ATAK, and Pypes Bomb sound clips. To me they sound similar to a chambered exhaust note. I guess I will wait and try to hear different exhaust systems this spring, hopefully at some car gatherings/shows, ( or at DAVESVT2000's garage) before making a purchase.