J-Thomas offers both OEM and aftermarket prefilters and air filters for your outdoor power equipment.   Our high performance air filters are designed to extend the life of your equipment. Changing your air filter is an important part of maintaining your mower.  Allow our selection of discounted air filters and prefilters extend the life of your commercial mower.  We offer a complete line of top quality aftermarket air filters for all major brands and we stock air filters from manufacturers like Briggs & Stratton, Kawasaki and Kohler.