... Engines piston rings. United Material Piston Rings: for M.A.N. Engines Compression Ring | Intermediate Ring | Oil Ring We offer different ... for this purpose. Application:Piston rings set for M.A.N. heavy trucks & buses engine.Engine Models: D 8613 , D ... , D 0024 M 220/221 , D 0026 M 1/2/H , D 0022 M 161 , D 0026 M 1/2 ... /H , DO224M/ME/MF , DO226M/ME/MF/MFA/ , D 0216 , MXUL , ...