K&N Air Filter (Bloomington, IN) $50
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Purchased for a 2011 FXDC I no longer have. Only used for a few hundred miles. Paid $80.00, price is $50.00. Fits many other HD models also. For other models this fits go here:
http://www.harley-davidson.com/store/original-equipment-air-filter-elements-pa-12-2919108--1
Click on Fitment at the bottom of the page.