Regarding the product specifications of 1r-0750 cat fuel filter： Thread size 1-14-2B Diameter ：85.7mm Height ：181.5mm Package includes: 1 *Diesel Engine Fuel Filter Fits model： Compatible with 1R-0750 Fuel Filter Compatible with Donaldson P551313 Compatible with Baldwin BF7633 Compatible with Fleetguard FF5320 Compatible with Wix 33528 Compatible with Caterpillar 1R0750/ D4E D6HLGP 14H and more Compatible with 2001-2016 GM 6.6L Chevy/Chevrolet/GM/GMC Duramax Diesel 2500,2500HD,3500,3500HD (Requires an adapter if used on a Duramax engine) Compatible with Duramax 6.6L 2001-2016 Chevrolet/GMC LB7/LLY/LBZ/LMM/LML. Compatible with Ford and FreightlinerCompatible with Ford Truck Models:C8000,CF8000,CFT8000,CT8000,F8000,FT8000,L8000,LN8000,LNT8000,LS8000,LT8000 (cat 3208 Engine),CT8000 (cat 3208 Engine), LT9000 (cat 3306 Engine). Before ordering, please confirm whether the accessories are suitable for your vehicle to confirm compatibility. Installation Tips: 1. Requires an adapter if used on a Duramax engine 2. Use clean gasoline and change the filter regularly. 3. After installing the new filter, in the first time start the engine.Waitting for a few minutes and checking for leaks.