This is our replacement shaft for the S2000 platform; the factory shaft has a very small c.v. on each end. The c.v. ends are quite weak and under extreme abuse tend to fail quite both prematurely and unexpectedly. The shaft has a set of 7075-T6 Aluminum plates that convert the shaft over to standard flange mounts for a u-joint style shaft. This along with our shaft enables the system to handle 650whp. The kit comes complete with (2) aluminum conversion plates, shaft and all hardware. When you're serious about your S2000's drive train and its time to take it to the next level!