Welcome to RAVHD, home of the world’s first automated diesel particulate filter (DPF) cleaning guide and tracking system created for FSX’s DPF cleaning equipment. RAVHD’s DPF Tracking System was officially licensed exclusively to FSX Inc. as FSX TRAPTRACKER. Diesel Particulate Filter Tracking System is powered by RAVHD technology and developed by RAVHD and is now available for all DPF cleaning equipment.