Fit For HDi, TDCi, Pumpe Duse Engine. 1/4 US Standard Air Inlet, 46PCS Compression and Leakage Test Kit. WIDE COMPATIBILITY, VERSATILE USE: 46-Piece Engine Compression Testers, compatible for use with most cars, trucks, buses, agricultural and marine engines, designed for use with modern gasoline and diesel engines, including HDi, TDCi, Pumpe Duse (PD) and older diesel and gasoline engines.