I notice a slight boost in power when I change my paper air filter, but after 5000 miles I see a lot more smoke until I change the filter. I have run Cat heavy equipment for close to 30 years and they use a air filter system with a swirling dust bowl that collects the big stuff....then a large paper filter that is meant to be blown out to clean it...then a inner filter to make sure NOTHING gets in the engine. These filters supply a lot of air for the turbo engines and every major manufacter of heavy eq. use a system just like it.
I am going to install one on my car and should save money and time...and help the car run better. Anyone else tried this?

Chapp

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1983 300SD 343K everyday car
1983 300SD 285K from junk yard-tooks parts from deer car- runs great. Brothers car.
1984 300SD parts car-Hit deer
1979 300D 175K non-turbo "Doctor"
1979 300d parts car