Most of our customers own cars that came with drum brakes as original equipment, and sooner or later, they need to make a decision about upgrading to disc brake technology. If you own a very rare, museum quality classic car that is 100% original, you can make a reasonable case for leaving things alone. That said, most of us are not driving factory original classics, and there are certain areas of the typical daily driver (e.g., air conditioning, suspension, brakes) that merit upgrades. You probably understand disc brake systems are safer and more efficient than drums, but do you know why? And, assuming you are looking for a disc brake conversion kit, should you upgrade front and rear, or the front end only?