These are 20° stock replacement brushes for the Ghost Cat & the Wizzard Fusion Hood System . These beautiful brushes feature a race-proven Copper compound for great conductivity, less arcing, a cleaner comm, and thus more power! The brushes are also manufactured with 20° Advanced timing, a full flat bottom/top surface (no need for the extra stabilizer), an offset notch to ensure spring pressure is applied in the proper place, a longer ‘footprint’ so the brush is less likely to tilt and rob power.