What are you looking for? UK’s largest range. Available 7 Days a Week. From a shop near you. K&N Race Air Filter Motorcycle Motorbike HA-1004R – Honda. See product description for full fitment list. K&N racing air filters are designed to have just two layers of cotton to provide even less air restriction than the standard K&N replacement street air filters. Fuel management modifications will be necessary with this racing filter, unlike the standard replacement air filters. High air flow with excellent filtration. Designed to increase horsepower and acceleration. Easy high performance add-on. This product is suitable for the following motorcycles. 03-04 (4), 04-05 (5), 05-06 (6), 2006 (7). Latest Verified Customer Reviews for K&N Race Air Filter HA-1004R – Honda. No reviews have been posted for this product. SPORTSBIKESHOP LTD is registered in England No.