The Filter of HKS Super Power Flow collects dust, Because of that intake efficiency will decrease after long time usage. In order to keep the dust from accumulating and maintain engine performance, the filter should be periodically replaced.
* Approximate change period:
Wet type: after 3 to 6 months, or drive 3,000km to 5,000km
Will fit HKS Mushroom Air filter with the size φ150 only