Zippy said:
I've always wondered the same...but, I think Donaldson is the manufacturer. they supply OEM air filters for Detroit Diesel heavy duty engines.
Gotta ride with Zippy on the best for a Z. As a fresh air breather vs the regular C5 which has the front two openings blocked off. The Donaldson for sure the best for a C5 Z.
Question having direct chanels to the intake, like the vararam, as most have lowered there Z, as one flooded intersection and your buying a motor.
Oh also, they also make the filters for the M1A1 Abrams Battle Tank. considering its turbine powered that does its stuff in a sand pit. And sand in a 40,000 rpm turbine, need I say more. They make good stuff, that kicks ass on the battle field and the street.