R1 Concepts front drilled and slotted Geoperformance rotors for Chevrolet HHR (2007–2010) are described as direct-fit front replacement rotors for those model years. The drilled and slotted rotor face is intended to help pad cleaning and heat dissipation under braking duty, providing a vehicle-specific front rotor option for the listed HHR applications.
DFC 07-10 Chevrolet HHR Front Drilled & Slotted Geoperformance Rotors