... & BUS Engines piston rings. United Material Piston Rings: for M.A.N. Engines Compression Ring | Intermediate Ring | Oil ... D 8614 M , D 9532 M , 2 BNM/S , D 0022 M 161 , D 0024 M 220/221 , D 0026 M 1/2/ ... M 161 , D 0026 M 1/2/H , DO224M/ME/MF , DO226M/ME/MF/MFA/ , D 0216 , MXUL , DO824 Euro II, ... I , DO826 Euro II, I , D2146 M , D2156, HMXU , D 2356HM2/HM9/HM10/HMN2 ...