Megan Racing Nissan 370z 09+ Single Exit Cat-Back Exhaust System - Blue Tip - MR-CBS-N7Z-DS-BTOne of Megan Racing's strongest products, the Cat Back System is made of SUS 304 Stainless Steel with a fully polished surface, CNC machined flanges and mandrel bends. Its aggressive styling, and deep, strong tone are just part of the MR Cat Back characteristics. It also serves to improve horsepower, torque and overall performance with its straight through design. The exhaust systems have 2. 5 piping and 3 piping for certain forced induction models.