https://www.dpfcanada.com/
DPF Canada is owned and operated by D & J Filter Service and offers diesel emission filter cleaning, aftermarket sales of Diesel Particulate Filters (DPF), Diesel Oxidization Catalysts (DOC), and dust control filters locally in the Sudbury region, and throughout Canada.
Since starting in 1998 with dust filter cleaning, the company has expanded in 2007 to include diesel emission filter cleaning. It has additionally moved into the DPF / DOC aftermarket supply within the following markets:
• Tier 4 Off-Road Heavy Equipment
• On-Road Heavy Diesel Truck
• Light & Medium Duty Diesel Truck ... 
Canada