Kit includes cylinder head block-off plates ZTSE42893 & ZTSE42892A, thermostat opening block off plate ZTSE42891B, 0-30 psi gauge with pressure regulator and all necessary hardware. Note: When servicing a DT 466 / 570, HT 570 engine, this kit must be used with the ZTSE4647 and ZTSE4648, not included in ZTSE4289A. May also need to order from Navistar PDC p/n’s: 1888287C91 (Coolant Plug) & 1817812C1 (M8x16mm-1.25mm long bolt).