The Hawk Performance HP Plus (HPX) series is designed for track day and autocross enthusiasts who require high-performance braking that can also handle street driving. These pads offer an extremely high friction coefficient and high temperature resistance. This set is specifically designed for Wilwood 6617 / HB800 calipers. Kit includes: - Disc Brake Pad Set (4 pads per box) - Part Number: HB800C.670 - Compound: HP Plus (HPX) - Pad Shape: HB800 / Wilwood 6617 - Thickness: 0.670 inches / 17mm Key features include high fade resistance, superior initial bite, and consistent pedal feel under heavy thermal loads. Ideal for club racing and performance street upgrades.