Air Filter Spring 7 12 4 Replacement Springs for Walker Airsep filters. The 90 Molded Hose is specially formulated for long life and oil resistance. Use it where the bend radius of the straight WalkerFlex hose is not sufficient. Replace every 5 years to ensure proper hose integrity The Restriction Indicator measures inlet airflow at the Airsep unit. It shows red if the filter is dirty and engine air is restricted, which can lead to poor engine performance. Once activated, it can be reset by pressing the top reset button. It attaches via a 18 NPT port on the unit Sealing Compound creates a seal between the air filter and the Airsep cannister, and allows for easier removal when air filter elements are removed for cleaning
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