Will also retrofit earlier K models with 14V 32 amp alternator. Early K model original clutch housing will require replacement to accommodate driving dogs. For the early K models with 32 amp alternator, the retrofit will require rubber mounting BMW-ALTK877 (3 piece set) with new alternator clutch housing (BMW # 12 31 2 305 329) and driving dog (BMW # 12 31 1 460 304).
