Zippers Performance Z650-008 Sprocket Shaft Spacer for Softail 07-17/Dyna 06-17/Touring 03-16Use these hardened and ground spacers when converting 2003 and later Twin Cam engine cases to a Timken output bearing. These spacers will provide correct primary chain sprocket alignment when assembling the engine with the wider Timken bearing.* Suggested Additional Purchase: 1. Timken Bearing # SS31 4013 2. Timken Shim Set # Z648 605 Fitment: Touring 2003 2016 Dyna 2006 2017 Softail 2007 2017 Features & Benefits: * Width = 1. 094in. * OD = 1. 751in.