Air Filter

BIG JOE

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I say: Donaldson.. like is used in the Ford AIS system, for the 7.3.

Joe
 

Stroked68

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Donaldson x2! Better than stock and better than K&N. Makes a big diff! The DIY intake is one of the best mods you can do.
 

mp18d

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Absolutely Donaldson/AIS.
Flows huge amounts of air (especially if you do some version of opening up the intake) and the filter is very effective!

Mike
 

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