- Shape: Fits wedge styled OEM air cleaners. Economically priced but high-end quality and offering superior flow, longer service intervals, better flame resistance and will last much longer than comparable foam or paper type filters. Filter elements are constructed with 4 layers of ribbed cotton filtering media. This will maximize air flow but still provide adequate filtering capacity, equalling the best performance filters on the market. Very durable through the use of coated wiring mesh. Washable and ready to give years of trouble-free use. OEM replacement reference 29400212. Note: All air cleaners mentioned here are for HDI (HDI=H-D International models, or simply 'outside the USA' models) unless noted otherwise.