Every source I checked said this cabin filter was correct for the 2018 Freightliner 114SD, even the K&N -site. The dimensions given refer to the box and not to the actual filter. 10 3/4" x 10 3/4" is the size of this product. I've been a long time fan of the engine filter and was really excited to finally use a K&N cabin filter, but it just doesn't suit me.
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