Benefits of Baer rotors are better cooling and reduced brake fade, besides good looks! The basic package consists of 2 piece front and 2 piece rear rotors.
Baer's 2 piece rotors feature lightweight aluminum hats and are the world's first direct OE replacement rotors to deliver real and measurable performance gains. By eliminating the weight at the center of the stock iron rotor, Baer is able to cast the new rotor with more mass in the "fire path", where the pads contact the rotor, allowing substantially more heat to be absorbed into the rotor. Balancing and heat-treating, coupled with the increased pumping efficiency of directional vanes (vents), ensure that EradiSpeed™ rotors deliver substantial performance benefits. Something that OE or cosmetically altered OE rotors simply can't do.
Note: offerings are complete packages containing 4 rotors.