Superseal neoprene gasket base seals perfectly even in the most extreme conditions without the hassle of messy grease. Superseal greaseless filters make the chore of servicing air filters a breeze Superseal base is not affected by gas or oils Extra wide sealing ring for airtight seal Constructed with bonded dual layer foam Coarse outer layer to catch large particles and resist clogging Finer inner layer to trap the finest particles of dust 100 percent open cell foam will not swell with the presence of water, fuels, detergents or oils Outlaw Racing filters are bigger than stock filters for better airflow and provides more protection