This is a Hitachi Direct Drive Starter for Nissan B210 / 210 Series. There are 2 Basic Styles Here, and Two Case Lengths in Each Style. The Most Popular is the OEM No. S114-160 (104-122A) Which is a Shorter Case, Later Version (The Solenoid Mounting Bolts are Offset Rather Than Directly Across). The Longer Case Version of This Style is the S114-163 (104-122). The Earlier Versions are the Short Case S114-87M (104-122B) Which Has the Solenoid Mounting Bolts Directly Across From Each Other, and the Longer Case Version (104-122C) , Which is OEM No. S114-156. All Styles Should Interchange. The 16211 Has a 9-Tooth Drive. The Same Looking Unit With an 8-Tooth Drive is an 16579 (Fits Nissan 310 / F10 Series).