The L20073 is an old stock filter from the 96% efficiency days. It spend 5-6k miles with regular oil on a 97 Accord with the F22B2 engine. The HP-2009 is of somewhat recent production. It spent 9-10k with PU synthetic on the 04 Corolla. The L20073 media has 64 pleats and the surface is 216 sq in. The media is much thinner than on the K&N filter. The HP-2009 media has 51 pleats and a surface of 164 sq in. The can on the K&N filter is overkill, and even more so for the filter base. Enjoy.