In order to get the best performance, engine power, and efficiency, from the special characteristics found in the S2000 TODA 2350cc or 2400cc stroker kits, Toda has developed this exclusive 70mm muffler system through extensive Dyno and circuit testing. TODA Racing now add a ver.2 resonator muffler set to this line-up. The resonator is fitted to the front pipe, and this allows low end RPM noise to be reduced without increasing exhaust resistance.