Upgraded 240mm change over kit. Upgraded Aluminum flywheel included. Will not work with OEM or different brand flywheel. Included: HD pressure plate, sprung clutch disc, tool, and aluminum flywheel. 170% Increase in Holding Capacity - RACE/STREET The FX400 System uses the Power Plus I, Hi-Leverage, Heavy-Duty Pressure Plate with a custom and extremely durable, Sprung Ceramic disc. This is the ultimate extreme duty street and/or road/drag racing system. It is available in a 6 or 8 ceramic puck configuration. The 6-puck being the more aggressive setup and 8-puck being the less aggressive. The sprung hub design allows for moderate dampening in high-torque applications, rendering it much more street friendly than solid or rigid designs. This disc is designed for long life, outstanding holding capacity, and rapid heat dissipation. The FX400/HDCL (8-puck) ceramic full face disc design creates a quick and rapid engagement and maintains minimal chatter due to the marcel cushion between the disc linings. This disc is designed for street driven vehicles. The FX400/HDC6 (6-Puck) ceramic paddle design creates a quick and rapid engagement as well as clutch chatter that may not be ideal for street driven vehicles. Warning Due to the solid (no Marcel) friction rivet design, the FX400 6 disc engages very quickly and may chatter slightly in first and reverse. To help alleviate this problem, we only use premium ceramic friction material. Heavy-Duty 4 or 6 puck or Segmented 8 Puck Ceramic Button Disc Ceramic based clutch disc are not intended to increase the life expectancy of a clutch but rather to increase the holding capacity and improve the durability of the clutch. Using a ceramic based material for easy street driving may reduce the life of the clutch kit due to harsh engagement and higher tendency to slip the clutch kit. Ceramic disc are never recommended for stock or near stock vehicle applications.