TCKR Smart Design D/A Coilover System - Proven on the street and track, this system is unmatched by any other system on the market. TC Kline’s unique Smart Shock technology mated with our True Match VVS alloy springs (see springs) make this ride height adjustable kit the most versatile available. Incorporating separate external compression and rebound adjusters, the shocks can be dialed from street comfort to a full race setup in minutes.
These features combined with our complete selection of VVS alloy spring rates make this kit the uncompromising choice for street comfort and performance. The Smart Design System is perfect for driving school enthusiasts, autocrossers, club racers, and serious pro racers alike. We can also build Double Adjustable Struts and Shocks for use with stock diameter springs for competition classes which require stock configuration.
Above information provided by TC Kline Racing.
We have successfully use similar struts and dampers to finish #1 in Redline Time Attack in our 335i in Las Vegas IR and several top 3 finishes. These are excellent twin tube technology dampers.
***Camber plates are optional***
***Swift springs are optional***
More information here:
http://www.1addicts.com/forums/showthread.php?t=544141