MagnaFlow 18-19 Audi A5 Dual Exit Polished Stainless CatBack Exhaust - 3in Main Piping DiameterThe MagnaFlow 2018 2019 Audi A5 Sportback Sport Series Cat Back Performance Exhaust System 19390 enhances your 2. 0L 2018 2019 Audi A5 Sportback with an aggressive character that is sure to help you stand out from the other Audi A5 Sportback you encounter on the street. With its 3in. diameter fast flowing mandrel bent main piping that passes through 2 Straight Through mufflers before ending in a Dual Split Rear exit with 4. 5in. Polished Welded On