The Genuine OEM Kohler Air Filter with Free Pre Filter-3208313-S 3288313-S1 is specifically designed for Kohler CT, EKT, and KT series engines. This high-quality air filter is created by the manufacturer of the engines themselves, ensuring a perfect fit and maximum performance. It comes in a pack of 1 and is suitable for gas power sources, making it a reliable choice for maintaining your lawn mower's engine. The free prefilter included adds an extra layer of filtration to keep your engine running smoothly.