This set of brake pads is meant to be used for the Tech-53 MK1-2-3 Big Brake Kit. This will fit both 256mm and 280mm versions. The Wilwood BP-20 brake pads have a unique metallic composite formulation that delivers an aggressive feel without the harsh noise, high rotor abrasion, and extreme dust levels associated with high metallic-based compounds. The pads work well in: Medium to heavy-duty braking dirt oval tracks; advanced-level track day and club sport competition; extreme-duty dual purpose street/track vehicles; high-speed or heavyweight drag cars; and hobby or sportsman category asphalt racing. Increase your braking performance without raising the braking temperature with a set of Wilwood Smart Pad BP-20 brake pads.