are you looking at Muscle Car Brakes ? if i understand correctly they're saying 2 to 1 braking improvement over oem. that's a bold claim but maybe it's possible. not cheap for all four but maybe it works. i blew a lot of money on this and all i have is parts in the attic. i still have the carbon metallic shoes but i think any of those non asbestos linings need a robust power assist to make them work.