A good quality tractor style multi stage air filter as used on our Petter engine powered pump and generator sets etc. This filter could be used for any engine in need of a well made multi stage air filter that will accept the 1.5" female pipe which clamps down at the side of the main filter assembly.

This filter has several stages of particulate removal including a top dust separation bowl with sight glass and several inner filters with an oil bath section located at the very bottom which can be removed for periodic cleaning.

See the bottom half of the picture for an example of how the air cleaner is arranged, this is without a doubt our finest air cleaner to date.