Get the most from your Cold Air Inductions free-flowing air filter by keeping it in top performing condition with this air filter cleaning kit. The Cold Air Inductions Recharge Kit includes a spray bottle of cleaner and spray bottle of high-performance air-filter oil. Recharge your Cold Air Inductions air filter every 4,000 miles for optimum performance.  If you cannot see the wire on the pleated filter, it needs to be recharged.