Complete BRAND NEW in the boxes TC Kline Dual Adjustable coilovers with custom springs, height adjusters, rear upper mounts. This is the complete set up with all the extra parts, INCLUDING the TC Kline camber plates. This is as good as it gets for the E46 M3. Here is the quote from TC Kline:

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 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 both street comfort and track 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. Kit includes TCKR Height Adjustment and Buna rubber rear mounts and Proprietary KONI Double Adjustable Shocks. Buna rubber rear mounts may be upgraded to TCKR Monobal rear mounts.

I need to sell to buy Porsche race car parts, this was over $2800 new, asking $2400 obo, absolutely new in the boxes. I will split shipping costs.
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Just to be clear, has this been installed on a vehicle at one time?

No, it had never been installed. It was sold last week.

I'm going the opposite direction, having sold my 911SC track car, I'm trying to make my street car "trackable." Good luck.