These are the nicest, lightest, and trickest MSD box and tach mounts we've seen. Beautiful black anodized brackets come complete with dzus springs riveted in and brackets are ready to be installed. 3 piece bracket set can be used to just mount the MSD box if desired, or the box and tach combo. MSD box mounts weigh under 1 oz. MSD box and tach mount combo weights only 2 oz.