Manufactured from 304 grade aircraft spec stainless steel, we believe that our performance exhaust systems are the finest on the market. At POWERVALVE we carefully analyse the original exhaust system, and then we re - design from scratch, our own carefully thought out performance variant. By using this process we are able to engineer specific attributes into the system, taking into account the exhaust tone and performance capability. We are then confident in offering to you a performance system, that has been thoughtfully designed with the specific target user in mind, after all each particular car model has its own unique target consumer. Again using our skill acquired over many years we believe and are fully confident that our performance systems hit the right spot audibly. Once the right tone is achieved, we build in the performance capability of the system, by carefully analysing the engine output to its ultimate dynamic capability by remapping and induction modificatio