Arrow Mufflers for the KTM Duke 390 require a 'link' pipe to adapt to either the stock header. The reason for this is because they use the same front caps on many different models of their mufflers and 'adapt' them with a link pipe to the stock or Arrow header.
This product can expose you to chemicals known to the State of California known to cause Cancer or birth defects and reproductive harm. For more information go to: https://oehha.ca.gov/proposition-65
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