Put the cat filter in the stock location and youll have some clean fuel.
2004.5-2005 Chevy/GMC Duramax LLY 6.6L Parts - Lift Pumps & Fuel Systems | 2004.5-2005 Chevy/GMC Duramax LLY 6.6L - Fuel Filters and Additives | 2004.5-2005 Chevy/GMC Duramax LLY 6.6L If youre doing an AD then youll have your water separator on that.
2006-2007 Chevy/GMC Duramax LBZ 6.6L Parts - Lift Pumps & Fuel Systems | 2006-2007 Chevy/GMC Duramax LBZ 6.6L - Fuel Filters and Additives | 2006-2007 Chevy/GMC Duramax LBZ 6.6L.
2007.5-2010 Chevy/GMC Duramax LMM 6.6L Parts - Fuel Systems & High Pressure Oil Pumps | 2007.5-2010 Chevy/GMC Duramax LMM 6.6L - Fuel Filters and Additives | 2007.5-2010 Chevy/GMC Duramax LMM 6.6L.
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