Featuring advanced dual-stage filtration system that combines synthetic oil wetted pre-filter with pleated filter, microGreen® Extended Performance Air Filters are 99% efficient and extend change intervals up to 3 years or 45,000 miles. Filters capture and hold 3x more dirt than OEM models, keeping engines cleaner over extended use and time. Available as direct replacements for conventional filters, microGreen® filters come in axial, conical, panel, and radial designs.