The Cover is for the right hand side and is number 2 shown in the diagram and comes in chrome.
This item fits the following models: Triumph America Carbs, America EFI, Air Cooled Bonneville & Bonneville T100 Carbs, Bonneville T100 EFI, Bonneville EFI > 380776, Bonneville from VIN 380777/ SE, Speedmaster Carbs and Speedmaster EFI.