K&N Engine Air Filter: High Performance; Premium; Powersport Air Filter: 1990-1999 HARLEY DAVIDSON (FLSTC; FLSTF; FLSTS; FXST; FXSTB; FXSTC; FLHR; FLHT; FLHTC; and other select models) HD-1390

ULTIMATE LONGEVITY: No-hassle lifetime limited warranty on stock replacement K&N air filters- limitations apply ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance 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. RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable; premium materials and state-of-the-art construction methods to last a lifetime