Those are actually a very good aftermarket IMPROVED copy of the original OEM version but they have thickened the top mount tab plates that were too thin on the original Triumph factory models and caused flexing when using h'way pegs. Triumph updated their own original version by redesigning the top mount completely. Both work. I had these on my Roadster and they saved me twice at least on slow or walking speed tip-overs due to road conditions, engine faults or balance issues.