The Diesel Particulate Filter Gasket creates an air-tight compression seal between the exhaust and particulate filter to prevent harmful exhaust fumes from entering the atmosphere. It is highly recommended to replace this gasket any time the DPF is being serviced to avoid inefficient filtering and a potential check engine light. CARDONE now offers a cost-effective, high-quality repair solution when servicing a failed or damaged diesel particulate filter (DPF). Our direct replacement diesel particulate filter gasket kit contains all the gaskets and nuts needed to seal the DPF during installation.