A brainstorm of the United States, the D2 coilovers has too many features that put it in the top notch performance. The inner threads made of Teflon ensure zero percent rust on them, the entire durability is improved through the Aluminium (6061 grade, with T6) which makes the entire structure hard. The adjustments and the enhanced strut travel through the inner tube make it easy to install and provides a better ride control. The compression and rebound adjustments make the suspension system ride selective. The entire body is electroplated to prevent from rust and corrosion and the design of the inner tube is made in such a manner that it reduces oil leakages. With a quality that is unmatched, the D2 remains the best upgrade in the form of coilovers.