Hello together, I drive a Saab 9 3 TiD and want to set it up a little I am looking for a sports exhaust (do not have to be loud) but only look “good” because I can never see this little black tube one time.. furthermore I am looking for a serious tuning company that offers chips or complete control units for my car (possibly also for self-installation).. can you help me there? many thanks already in advance