Swapped the genuine air filter in Serenity for a K&N one.

Tags: air filter, K&N, Land Rover Defender, micro Slug: swapped-the-genuine-air-filter-in-serenity-for-a-kn-one Supposedly the last air filter I will ever buy. Hopefully this is true. In any case, it should be cheaper overall given that you can wash them and that will contribute to less landfill.