Arlen NESS Chain Drive Kit - 27/57 Tooth - Black - FLT/FLH635089740 Product Description Converts '09 and up FLT Touring models to chain drive for aggressive riding & big horsepower engines Each kit features specially designed front & rear sprockets that allow for bolt on installation, eliminating the need for grinding the inner primary for clearance Feature specially designed 27 tooth front and 57 tooth rear sprocket sizes that prevent the chain from grinding on the swingarm Retains factory gear ratio Both