400ex pipes duncan racing
#1
I was just wondering if the duncan double barrel/ dmc is the best pipe/exhaust for the 400ex also how much horsepower would the best pipe, k&n filter, dynojet jet kit, and a high rev kit add to the original hp?
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mrtidy
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
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Feb 3, 2016 05:00 PM
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