Front & Rear Cross Drilled / Slotted Rotor Package + Premium Ceramic Pads 2009 - 2012 Infiniti G37X "X" AWD Models ONLY 4 Brakewerkz Tek Series Drilled / Slotted Brake Rotors ( Fronts & Rears ) Manufactured by Powerstop Powerstop Evolution Z16 Ceramic Pads offer superior resistance to fade without the noise and dust associated with metal pads. ( 2 sets Front & Rear - 8 pads ) Rotors are made from G3000 grade castings for strength and zinc treated for rust resistance (not just painted) Cross drilled holes are chamfered and counter-sunk for durability / Cools brakes up to 150 degrees Slots are round-milled for longer service life. Rounded slots help with degassing and channel away dust