Non-ferrous guide bush (M104.990 engines of the first version)
Engine valve guide M104.990 (first version). Dimensional characteristics of the sleeve are given in Specifications.
Ceramic-metal guide bushing of M104.990 engines (second version) and М104.944/994
Ceramic-metal guide bushing of M104.990 engines (second version) and M104.944/994. Dimensional characteristics of the sleeve are given in Specifications.