Reply to "K&N air filter for Duramax Diesel- Yes or No"

Jason & Celia-TexasMaster Camper Lifetime Member

@Eric Dye posted:
I have an 03 Duramax and I run the standard filter. The K&Ns let too much air and particles through for normal driving. If you are drag racing and trying to squeek every last bit of HP out of your truck, then K&N might be ok. The HP gains are actually negligable on daily driving applications.
The most important filters on the truck are your fuel filters and water separators. Make sure those are new and change them on schedule. I run extra filtration from a company called FASS. https://www.youtube.com/watch?v=NqfE1eqfTwU
https://amzn.to/3IwKl76

Thanks.

From what I am reading, its mainly an issue with 2020 and newer Duramax’s.

I am taking my truck in for an oil change this week and wanted to change the engine and cabin filter first. The last time I took it in the dealer wanted $150 for both air filters on my gasser. Thats getting a little pricey for my taste.

3/10/247:57 AM

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