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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    So I learned the hard way on the road that my LLY runs hot when towing in the heat. I already have a k&n intake that I’m not wild about (plan was to upgrade it to a different filter). Can I run an improved turbo mouthpiece with the K&N intake or would I need to swap that out to make it work?
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