Yamaha WR450F 2019 - 2022 Yoshimura RS-4 Slip-On Exhaust w/Aluminium Muffler

Yoshimura RS-4 Slip-On Exhaust w/Aluminium Muffler

The 2020 Yamaha YZ450F has undergone significant changes in both motor and chassis refinements, and seems to be the 450 that many are choosing.
It's no secret that the Yamaha YZ450F has a very good stock system that many of our competitors can't beat. We spent a lot of R&D time in the dyno room and track to create our RS-4 Signature Series to what we think is the best aftermarket exhaust for the new YZ.
Proudly made in the USA!
Pentagonal-shaped sleeve
Front muffler cap functions as a poly-resonant chamber which helps reduce noise
Two-stage stepped baffle
Carbon fiber end-cap
Stainless steel tail-pipe
Inserts and Spark Arresters are available for all models
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Sound Insert/Spark Arrester Options                 
€‹€‹
Sound Level
Volume Insert
Spark Arrestor
Included
INS-14-K
Yes
INS-23-K
No
SA-08-K
No 
  

Fitment Details

• Yamaha WR450F 2019
• Yamaha WR450F 2020
• Yamaha WR450F 2021
• Yamaha WR450F 2022