I think Bar3K is one of the ones who posted the air filter test comparisons.
I ran a K&N in my 1990 Toyota pickup and 4RUNNER both. I bought the truck new in February of that year and when a filter was finally available I installed one. I had close to 20K miles and about 7-8 months on the truck then. I drove in Moab as a tail gunner mostly during the Easter Safari for seven years and the filter was always full of red dust when I got home. The air box was a mess on the incoming side, but behind the filter it was clean to the eye and to a rag. I owned that truck for twenty years and just shy of 500K miles on the same engine and it was still running great. I got rid of it because I couldn't drive a standard anymore with my back problems. Just my experience with the K&N filter. I also ran one for a short time in my FJ until I just couldn't reach inside the engine compartment to do things anymore.
Go ahead, skin it! Skin that smoke wagon and see what happens...
I'll ride in on a sunny day, Sing you a song, steal your heart away Like a cowboy Hang my hat like I'm here for awhile Kick off my boots and drive you wild Like a cowboy Well baby you know I can't stay long You wake up, I'll be gone Until then I'll hold on Like a cowboy.