Designing, developing, manufacturing race inspired performance products for motorcycles worldwide. Driven Racing, metal that moves you! 50% more weight to reduce vibration in the bars. Advanced two-piece design. Machined from billet 6061. All hardware concealed after installation. Made in the U.S.A. Note: NOT compatible with Kawasaki models with 8 mm threaded holes, models with hollow bars with an interior diameter of 13.5 - 15.5 mm, or the Ducati Panigale.