Thunderheader Exhaust on 2007 Fatboy Okinawa Japan JP
September 30th, 2011 by
Thunderheader Exhaust running a Vance & Hines Fuel Pak and K&N Air Filter. The bike had a small cough/pop upon releasing the throttle. I changed Cell 23 on the Fuel Pak from 16 to 15 and it totally eliminated it. This is a great sounding combo and easy on the wallet which brings a considerable amount of power to your Harley.
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