Yoshimura 19-23 YZ250F Sign RS-4 SO SS/AL/CF

All Signature series exhaust are tested, documented and marked with appropriate EPA noise emissions labels

Deos not require changing the motorcycle's emissions control systems

Delivers huge power at a very light weight

Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap

Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power

Two-staged, stepped baffle