Increase the braking performance and consistency of your GM muscle car with these front disc brake upgrade kits. These front disc brake kits offer superior performance over stock brakes at an excellent value. Stage 1 kits offer improved performance over stock brakes with excellent street manners. Stage 1.5 kits offer slightly more aggressive pads that can handle elevated temperatures, for occasional track day use or autocross, yet are compliant enough for street use. Disc brake upgrade kit fits '69-'72 GM A-Body, '69-'74 GM X-Body and '70-'72 GM G-Body cars. Brake Rotors Optimal drilled/slotted pattern for maximum heat dissipation and consistency. Factory 5x4.75 inch bolt pattern. Factory 11" diameter. Includes rotors for left and right side (pair) Brake Pads Maximizing the performance of your GM D52 calipers is easy when you choose Hawk Performance's HPplus braking compound. Hawk Performance's HPplus brake pad compound is ideal for Autocross and Track Day drivers looking for a high performance race compound that can take the heat of the track and get you home safely without having to change the pads. HPplus utilizes a unique Ferro-Carbon, high-tech friction material that was developed and manufactured for sport driving in autocross, Solo II and track day applications. Ferro-Carbon formulation offers lower wear rates and higher torque values than other competitive materials. Extremely high coefficient of friction for high performance streetcars used in autocross competition or that experience repetitive, heavy braking. Sold as a set of 4, 1 set will be needed to outfit 2 calipers.