As mentioned, you can get the Baer system with an aluminum hat section. Additionally, there is a reason the Baer brackets weigh more than the Wilwood brackets. There needs to be sufficient struture in the brackets to prevent any flexing in the system. If you get any flex in the brackets or calipers, you will get a long or soft pedal. If you are not pushing your car hard on a road course, why are you so concerned about weight. Safety is he main concern with a brake system.
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