HKS state that engine power is directly related to the amount of air an engine can take in and expel. Fitting an HKS Super Power Flow induction kit is one of the easiest and least expensive ways to increase the horsepower of any engine as it improves airflow into the cylinders. HKS's High Performance Air Filter Systems offer the ultimate in both air filtration and air flow for maximum engine performance. Filters are thrown away when their lifetime has expired and are replaced with new filters, which are inexpensive and easy to replace.