The N1 Evolution is the newest generation of our track engineered flag ship N1 suspension. All N1 dampers feature large piston, monotube design using a threaded base for height adjustments without compromising shock or spring travel. Every year, we gather incredible amounts of suspension data from our direct involvement in many different racing series. This specialized data goes directly into our sports parts development to provide the customer with the same cutting edge suspension technology we use on all of our race vehicles. The STREET version of the N1 Evolution focuses on the hardcore enthusiast that craves for the curves of the race track, but still requires a comfortable, "streetable" ride for the drive home. Internal valving settings have been extensively researched and tested to achieve the perfect balance between street and track. The N1 Evolution STREET is one of the most versatile coilovers systems we have produced to date. All components are made using the highest quality standards.