Superformance MKIII Custom Private Label Eibach Shock and Spring - Front. These are the standard Shock and Spring Combination used on the New MKIII's. As time passes advances to our equipment evolve. These new Eibach shock and springs are a 1/2" shorter in the front than they're predecessor which accommodate the 18" wheels much better and alleviates bottoming out. This Spring and Shock comes standard with 400-lbs spring rate. For custom spring rates please call.