HPS Performance 3.25" Open Top Dual Cone Air Filter, 5.75" Length, HPS-4342Key Features Features open top element with a dual cone design to take in greater air volume. Stainless steel mesh reinforcement to resist heavy suction over less rigid aluminum mesh. Specially formulated lightweight synthetic oil that will not affect or damage sensors. Filtering element traps particles as small as 10 micron. Flange ID: 3 1 4", total height: 5 3 4", element length: 5", base OD: 5 1 2", top OD: 5". The HPS Performance Dual Cone Air