1. It all begins here in the Design and Validation center. This is where Bilstein engineers develop solutions to meet the growing demands of both OE and aftermarket customers. When we visited the facility, we witnessed several engineers working in front of computers like the one shown here. Typically it takes design engineers up to 2 years to complete a 2- to 3-phase project. Many of the resources Bilstein employs for OE shock design and manufacturing are also used to support its aftermarket product line.