CTS TURBO B9 AUDI S4/S5 3.0T TFSI CHARGE PIPE KITDESCRIPTION CTS Turbo is excited to announce the release of the B9 Audi S4 S5 3. 0T TFSI charge pipe upgrade kit. The plastic OEM charge pipe is prone to failure at stock boost levels. The CTS charge pipe kit is a stout upgrade being able to handle more heat and higher boost. Our charge pipe kit will increase flow and improve the reliability of your B9 Audi S4 S5. Youll notice an increase in throttle response and a decrease in turbo lag. Product