The next option is to replace the stock link pipes with the Akrapovič variant made from titanium and incorporating 100 cpsi high-flow catalysts. These link pipes, when coupled with our titanium center muffler, produce a total weight savings of 8 kg compared with the stock system.When installing Akrapovič aftermarket optional down pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory. When installing Akrapovič aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.