Roland Sands Clarity Derby Cover For Harley Big Twin View the moving internals of your primary with this cover. Features: Direct replacement for OE derby cover on your OEM primary CNC machined from billet aluminum and polycarbonate Mounting hardware included (gasket sold separately) Available in a variety of finishes Note: 2006 Dyna Glide and all 2007-14 applications require the use of gasket (602-114)