Oversized Diesel Filter: Designed to increase airflow to help support towing, hauling, and high-demand diesel performance. Oil-Free Dryflow Synthetic Media: Easy-to-clean, no-oil filter that delivers long service intervals and simple maintenance for hard-working diesel trucks. Diesel-Spec Filtration Performance: Up to 99% filtration efficiency to help protect turbocharged diesel engines in dusty, off-road, and job-site conditions. Dual Media Options: Dryflow or Diesel-Spec 6-Ply Cotton: Choose our oil-free Dryflow synthetic filter for ultimate convenience or diesel-Spec 6-Ply fine-weave cotton for drivers who prefer the traditional oiled cotton performance feel. 55+ Years of Proven Engine Protection: Backed by decades of filtration expertise trusted by performance enthusiasts and diesel owners.