DOC'S DIESEL FUEL FILTERS - Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE - Replaces AC/Delco TP3018, Replaces Wix 33960, Replaces Baldwin BF46062, Replaces Premium Guard DF6117, Replaces Purolator F56117 FITMENT - Compatible with 2001-2016 Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD THIRD PARTY TESTED - 3 Micron @ 96.92% Efficiency Rating REPLACEMENT GUIDELINES - Above all recommendations, change according to your vehicle’s manufacturer warranty. Fuel Filters should be changed every 5,000 to 10,000 miles, or 15,000 maximum. Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE: Replaces AC/Delco TP3018, Replaces Wix 33960, Replaces Baldwin BF46062, Replaces Premium Guard DF6117, Replaces Purolator F56117. FITMENT: Compatible with 2001-2016 Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD