Skyline Emissions specializes in the design, development and manufacture of a complete line of aftermarket diesel particulate filters (DPF) and related emissions critical components. Skyline diesel particulate filters (DPF) are the leading alternative to OEM filters for a wide variety of 2007 and later heavy-duty and medium-duty on-highway diesel applications. Developed by an engineering team with decades of diesel emissions control experience, Skyline DPFs combine Exact-Fit™ design with exceptional quality and extensive performance testing. Skyline means greater value because our design, state-of-the-art manufacturing and testing capability have resulted in a durable DPF with extended service life. Our DPFs are built to last and will keep your fleet running with lower operating costs.