Piston Kit, U140/U151(Bonded) (Contains; 1 # 960, 1 # 980) # 960 (4.455"OD)(2.120"ID)(.985"Thk)(.475"Thk Edge) # 980 (4.190"OD)(4Tabs)(2.136"ID)(.879"Thk) 1999-Up