Now you know!! Here is the inside of my shock. I needed to put a new seal in and I decided to try out some different valve stacks. I have some ideas......they could be good.....or could totally suck and I will be doing this again shortly. All of the washer looking things are the shims that control the oil flow. These items are arranged in the shock when it is revalved. The thing on the left with the holes is the piston body. The piston separates the compression side from the rebound side. It also controls oil flow to the shims. The LC4 shock is totally different than the standard PDS style shock in any other KTM. The PDS shocks have 2 pistons a needle and about twice the amount of shims. I will have to post one of those next time I get one apart.