Yoshimura - RS-4 Exhaust Repack Kit - REPACK-RS4-ADV

Developed for high-output 4 stroke 4.1 mufflersFeaturing Acousta-Fil® for maximum durability and longevityIncludes end cap packing

RS-4 exhaust systems illustrates the endless cycle of development. Working in conjunction with the factory teams has provided us with new ways to increase performance, lower sound levels and...

RS-4 exhaust systems illustrates the endless cycle of development. Working in conjunction with the factory teams has provided us with new ways to increase performance, lower sound levels and...

RS-4 exhaust systems illustrates the endless cycle of development. Working in conjunction with the factory teams has provided us with new ways to increase performance, lower sound levels and...