I know that JCW springs can be purchased as a stand-alone item. I know that a VIN must be given when ordering, so that springs appropriate for that particular car's suspension can be supplied. But, as simple a question as it may be, what I can't get clear on is this: is there a JCW spring which is appropriate for, and can be purchased for, use with a CooperS stock suspension? Such an arrangement would pretty obviously be for someone who wants to stick with MINI parts and could be happy with the minimal drop of JCW springs.
If anyone has a minute to answer this, I'd be most appreciative!

 

All JCW springs are designed for the JCW Strut. You can install just the springs but don't expect a performance increase as the strut and spring were designed to work together. It will lower your car almost 4 tenths of an inch. People will say lower is better but if you are not going to get struts I would suggest a progressive rate spring like the Eibach.

 

I did install the JCW springs without the JCW struts. I do have the sport suspension and the handling has definitely improved. (I also added a 22mm rear swaybar).

For a few track days and a daily driver, I would recommend it.

If you plan on doing a LOT of autoxcross or track days, I would go for the whole setup or as Derosi said, go aftermarket.

HTH's,

Mark