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Yoshimura RS-4/RS-4D Muffler Repack Kit
Off-road systems need to be repacked after 6-8 hours of use, or after each Race. Repacking your muffler at the suggested intervals is essential for your exhaust to perform the way it was designed. Dirty packing restricts airflow from your motor, which results in a loss of power and degradation of sound. Repacking your muffler with a Yoshimura exhaust repack kit allows for freer airflow from your motor, which restores lost power and improves the exhaust sound.
Each kit includes enough components to service one RS-9D muffler:
Fitment is guaranteed or your money back plus free return
Don't waste time installing a product that doesn't fit. We
worked hard ensuring that this product is an exact fit on the
vehicles listed below.
KX250F 4-Stroke 2010-2014
DR-Z400S 2000-2009, 2013-2019
DR-Z400SM 2005-2009, 2013-2019
YZ250F 4-Stroke 2007-2013, 2019
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