ClutchXperts Stage 4 Miba* Racing Clutch Kit Is a brand new stage 4 Xtreme Duty Racing Pressure Plate With Stage 4. 6 Puck Miba Racing Disc Setup can hold and 70% more pressure increase over stock. ClutchXperts Stage 4 Miba* 6 Puck Miba* WITH SPRUNG SINTERED Racing Disc. A Miba* Composit Disc is a best material for friction material in the clutch market. .