Mishimoto 00-02 Audi S4 Black Throttle Body HoseMishimoto has developed a silicone throttle body hose for the 2000 2002 Audi S4. The Mishimoto Audi S4 Silicone Throttle Body Hose is a direct OEM replacement for the stock rubber hose. The stock rubber throttle body hose, which connects the cold pipes from the turbo up to the throttle body, can wear out from oil, engine heat, and the stock clamp design. These factors, when coupled with the constant movement of the cold pipes, put too much stress on