The Akrapovič Racing1 and Evolution1 open systems are designed for riders in road racing closed course competition and for those who attend trackdays and expect the maximum from their exhaust system. Those exhaust systems are within strict FIM and AMA supersport and superstock regulations. The Racing1 and Evolution1 open systems make the Suzuki substantially more responsive, and the HEXAGONAL muffler also provides a great visual modification. Please note that passenger footpegs have to be removed for installation.