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Amazon.com: 13/16"-16 to 1 1/8"-16 Oil Filter Adapter for Duramax CAT 1R-1807,478736,AGCO AG121853,BALDWIN B7225,NAPA 7791 : Automotive
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Amazon.com: Sinister Diesel CAT Filter Adapter for 2001-2016 GMC Duramax & CHEVY - 2 Micron CAT Fuel Filter : Automotive
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