Another Moser feature is the caliper and rotor design that allow for 25% more pad contact area than other calipers and allow for a 20% thicker pad than most of the competition. The kit ships with industry-leading Hawk HP PLUS pads that lean on their years of expertise in racing brake pad design and compounds. For the revolutionary rotor/hat design, we designed a 2 piece keyed, slotted and drilled rotor combined with a hat that utilizes a spiral retaining ring to help allow more radial growth during high temp cycles than the competing designs already in the market. This helps to reduce the sticking, warping, and bevelling that occur in most other designs under heavy braking. Moser's caliper along with the keyed rotor and hat design has over 4 years of R&D and track testing to assure reliability and performance. Ask any racer who is using these kits and you will find that this kit instills confidence like no other kit on the market. So when you are looking for the new standard in Race Ready Pro Disc Brake Kits, Go with Moser Engineering!