54 reactions · 3 comments | We’ve been working at this for a bit but our Polaris Boost Stock Muffler Mod is here! This modification to the stock muffler increases the flow for the higher horsepower tunes but keeps a stock external appearance with little change in the sound level!  LINK IN COMMENTS | Speedwerx | Facebook
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54 reactions · 3 comments | We’ve been working at this for a bit but o…
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