2005-2010 Jeep Grand Cherokee WK or Commander XK Big Brake Kit. This kit uses a Wilwood Areo6 calipers and WK SRT8 rotors. This kit works on the standard WK/XK spindle, no need to retrofit to the SRT8 spindle and calipers. Greatly improves stopping distances and eliminates brake fade during extreme braking conditions. Includes: Areo6 Calipers, machined aluminum radial mounts, BP10 brake pads, stainless steel brake hose, and all hardware. Must be used with 20 inch wheels. Will not work with 17" wheels. Rotors not included. This kit is made to order, expect 3-4 week lead time.