EXEDY IS ONE OF THE MOST BIGGEST CLUTCH MANUFACTURE COMPANY IN JAPAN AND THEY HAVE ALSO ANOTHER MANUFACTURE IN USA.THEY SUPPY THEIR CLUTCH TO MOST JAPANESE AUTOMOTIVE MANUFACTURE COMPANY.THIS CLUTCH KIT CREATES SIMPLE PEDAL OPERATION,HIGH RESISTANCE FOR SLIPPAGE AND SUPERB DURABILITY.THIS CLUTCH KIT & FLYWHEEL COMBO SET CONTAINS ALL 6 COMPOERENTS TO DO YOUR CLUTCH REPLACEMENT AND IT IS PERFECT SET UP FOR STOCK OR LIGHTLY MODIFIED VEHICLES.THIS CLUTCH KIT AND FLYWHEEL IS 100% BRAND NEW AND ORIGIANL FACTORY SEALED AND READY TO SHIP! XTD Flywheels are made using the highest quality, most modern materials available (Flywheel weight:10LBS). XTD could achieve manufacturing its original flywheels about 200% more strength compared with normal flywheels. It was forged using Chrome-molybdenum steel. The power of inertia rotation can be decreased by reducing the excess weight, and therefore, its strength directly passed through to the high response. The XTD light weight flywheel is made from the optimal weight and optimal form which were set up for each type of a car from the chrome forge material. By shaving all circumference of the chrome forge material, the variation in weight and the deviation of balance are pressed down to the minimum. Processing for raising wear durability and heat treatment etc... is performed in the surface. Various know-how for realizing lightness, strength, and high balance is condensed to the XTD light weight flywheel. If a flywheel is made light, it is said that an engine response improves. In case of revolving thing like a flywheel, the power (inertia power) which is always going to continue fixed rotation occurs. When an accelerator is stepped on in from an idling state, a flywheel tends to keep an idling state according to its inertia power, although engine is going to raise rotations.