This is the top of the line in suspension adjustable coil over shock technology. Due to its unique valving and wide range of adjustment (both rebound and compression) this series of KONI SPA-1 dampers is adaptable to satisfy many suspension requirements. The aluminum construction saves weight, and the adjustable spring platform accepts a 2-1/2" inside diameter spring. The shock eyes are outfitted with 1/2" I.D. bearing inserts.