Yoshimura - RS-4 Slip-On Mufflers


  • Sophisticated, stylish muffler design
  • RS-4 is a pentagonal-shaped muffler body that features a two-staged stepped baffle and carbon-fiber cone end cap
  • Muffler front cap design functions as a polyresonant chamber that improves mid-range and top-end power, and keeps the muffler quieter
  • Polished stainless steel or gloss carbon fiber muffler sleeve
  • Please see page 64 of the 2013 Parts Unlimited Street catalog for the complete line of RS-4 exhaust systems and slip-on mufflers