If you are a tech head just like me, you will like details like this. Just finished designing the new pistons for the production version of the ultimate coilover kit. this is based on an original bilstein piston but is modified for the larger cylinder diameter and added larger friction area for more durablity, the port entry sides are enlarged for smoother flow, also it will be machined of 7075-T6 alloy to reduce weigth. You can see guys why this project takes so long and so much effort to finish. I dont call this the ultimate coilovers for nothing... :)