ADS Racing Shocks coil overs were born from the years of desert racing experience our founders have accumulated. Performance, reliability and longevity were the primary concerns when ADS sent out to develop its coil overs, and we have not strayed from that initial thought process. Years of racing will teach you that ,if something can go wrong it will go wrong. With that mindset in place, eliminating the possibility of failure was the primary goal. Every single component on an ADS Racing Shock has a purpose from our screw in end cap reservoirs to the captive lower spring perch ensure that we have done everything to eliminate failure. Extended threaded bodies allow for larger range of adjustment on dual rate spring setups. Heavy duty adjustment collars prevent thread skipping when adjusting preload or cross over engagement. Truncated threads prevent dirt and debris from jamming into hardware. All these features add up to a coil over that is not only as tough as the desert it was born in but allows for ease of adjustment and use for years to come.