Add to Cart The item has been added CTS Turbo Cast Downpipe Set w/ High Flow Cats Audi C7 RS7 | S6 | S7 4.0T 2013-2018 The CTS Turbo Cast Catted Downpipe set for 4.0T Audi C7 (S6/S7/RS7) is a bolt on solution for increased performance. Our downpipe set eliminates the OEM cross over and includes the necessary harness extensions for the O2 sensors.CAD... $1,799.00 Add to Cart The item has been added Compare