These high-performance exhaust 3 ( 76mm ) cat-backs systems are engineered to maximize horsepower and torque gains

and its not just Hondas either

3ª Luce Di Freno

The Maxton Design body kit is aimed at all who wish to radically change the appearance of their cars and gain enhanced aerodynamics at high velocities

Downpipe - Porsche Panamera 971 3.0T CAT ET67 These high-performance exhaust 3 (Downpipe designed to: Porsche Panamera 971 2013 2018 3. 0T Inlet diameter (internal): 76 mm Outlet diameter (internal): 140 mm Outlet diameter (external): 78 mm TurboWorks downpipe, is made of 100% stainless steel. The downpipe has a 200cell catalyst and thermal shield.