Yoshimura

The RS-4 Race Series slip-on gives the CRF250L more power and torque, the RS-4 provides more punch at bottom end without sacrificing the mid and top power. The slip-on also removes a good amount of weight from the stock unit. Those that love the Yoshimura RS-4 sound will love the way it makes the CRF250L Rally sing!

Proudly made in the USA!

• Pentagonal-shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Two-stage stepped baffle
• Turn-out carbon fiber end-cap
• Stainless steel header and tail-pipe
• RS-4 stainless full system weight 9.3lbs vs Stock full system weight 13.2lbs.

The RS-4 Race Series slip-on gives the CRF250L more power and torque, the RS-4 provides more punch at bottom end without sacrificing the mid and top power. The slip-on also removes a good amount of weight from the stock unit. Those that love the Yoshimura RS-4 sound will love the way it makes the CRF250L Rally sing!

Proudly made in the USA!

• Pentagonal-shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Two-stage stepped baffle
• Turn-out carbon fiber end-cap
• Stainless steel tail-pipe
• RS-4 stainless slip-on weight 7.8lbs vs Stock muffler weight 10.3lbs.

• Updated version with weldnut inside of insert makes installation/removal easier
• Replacement USFS Approved Spark Arrester for RS-4 Mufflers with "Turn-out" end-cap.
• Available as optional Spark Arrester on applications not originally equipped with a Spark Arrester
• Kit Includes:
  • Spark Arrester Insert
  • End-cap collar
  • Set screw