Exhaust

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.

This gasket seals the joint between the head pipe and Exhaust port. These gaskets are designed to crush a little bit to tightly seal where the pipe fits to the head. Get a fresh one now avoid having an exhaust leak when you install your new exhaust.

This gasket seals the joint between the head pipe and muffler. These gaskets are easily damaged when removing the original muffler. Get a fresh one now to ease installation of your new performance muffler.

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

The PowerBomb is a four-stroke header that incorporates FMF's patented PowerBomb module at a precise location in the initial stage of the header. By positioning this "Bomb" at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system with a flow increase of nearly 10%!

Limited Quantity Available