XTD 6 puck "MIBA" Copper Ceramic clutch is designed for the serious enthusiast with just Stock to considerable modifications.("Miba" Copper Ceramic Material is well known for AirCraft brake material.It is more Durable and hold 60% more Torque capacity than Cabontic or Kevlar Material also "MIBA" Disc grips 30% harder than Cabontic Disc) This disc features 12 high-coefficient ceramic pads for quick engagement and the extreme duty friction needed. Our specifically designed high torque disc delivers maximum holding capacity without compromise. The sprung retainer assembly boasts 6 dual springs and 6 severe duty retainer rivets, ensuring power and reliability. XTD clutch kit includes 5 compoents that all you need set up the high performance clutch system. XTD pressure plate is made from ductile iron which is about 30-40% stronger than conventional cast iron pressure plates also ductile diaphragm has been heat threated for holding maximum horse power up to 320HP.XTD clutch kit creates Ultra grips and it delivers more power to your wheels.All XTD Clutch kit is certified SFI Certification and Designed for Street regal.if you driving miata 1.8L don't hesitate to bid on our item.simply buy our racing clutch kit and give to your mechanic for install it.this racing clutch kit is $399.99 retail price in performance shop