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Replacing Air Filter

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9K views 16 replies 14 participants last post by  Bucknaked  
I have a 2024 GMC Sierra 2500HD. I wonder if replacing my air filter system with a K&N system would be a good investment. Also, as a new diesel truck owner, I was confused about how many filters were in the truck and which to replace or if to replace all—looking for guidance from experienced diesel drivers. Thank you all.
Despite folklore and BS advertising they are actually terrible air filters. Look up project farm on youtube for testing.