K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 2008-2017 HARLEY DAVIDSON (FXDB Street Bob, FLS Softail Slim, FXS Blackline, FLSTSB Softail Cross Bones) HD-1611

ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%. EASY INSTALLATION: Pre-oiled and ready to install. One of the easiest and most cost-effective upgrades for your motorcycle or ATV for quick performance gains. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.