KYB Gas-A-Just shock absorbers are an excellent alternative to adjustable shocks. The special internal design creates a self adjusting shock that can handle hard abuse without performance fade and foaming like other gas/oil shocks. These are comfortable on the road, but when you throw the car into a corner they will stiffen up, it is a win-win. This is for the rear, and will fit any standard height or slightly lowered Mini.
 
Sold individually.