XDP Duramax CAT Adapter with 1R-0750 Filter, Bleeder Screw The XDP Duramax CAT Adapter with 1R-0750 Filter, Bleeder Screw & Spacer XD171 is an easy way to upgrade the fuel filter on your 2001-2016 GM 6 Duramax. The durable anodized filter adapter simply threads on to the OEM Filter Head and allows you run the more efficient and less expensive CAT Filter 5/5(10) Amazon: duramax cat fuel filter BETTERCLOUD 6 Duramax CAT Fuel Filter Adapter Fit for 2001-2016 Chevy GMC LB7/LLY/LBZ/LMM/LML. $135 $ 135. 59. FREE Shipping. 1R-0750 Fuel Filter for Chevy/GMC Duramax 2001-2016 LB7/LML/LMM Caterpillar 1R0750,Donaldson P551313,Baldwin BF7633,Fleetguard FF5320,Wix 33528 Caterpillar 1R0750.