DPF, EGR, Emission, DTC You only need to buy 1 piece for these transactions. You don't need to buy both egr and dpf. 

Atlas Bobcat Caffini Case Cat Dieci Doosan Hako Hidromec Hitachi Hydrema Hyundai JCB John Dere Kalmar Kawasaki Kobelco Komatsu Lannen Liebheer Linne Manitou Merlo New Holand Oxpo Palazzani Pistenbully Rubblemaster Sanward Sany Scania Terex Tigercat Unicarriers Volvo Wacker Neuson Yanmar