The CTS Turbo MK5 R32 3" cat-back exhaust system is hand tig welded using the finest T304 stainless steel. Our exhaust system was designed for both street use and big turbo abuse. Other MK5 R32 exhausts that are currently available can choke peak power and limit the breathing due to their 2.5"/2.75" construction. The 3" design of the CTS Turbo MK5 R32 turbo-back is ideal those of us chasing serious horsepower.