Yes, you definitely need adjustable front end links. Especially when you go lower, the stock end links won't fit.

 

That's strange. I had ST coilovers on my JCW, lowered at least 1.5", probably more. I didn't need front end links or anything in the rear.

EDIT: After more research, I just bought ALTA front and rear endlinks, and Hotchkis lower control arms. You don't NEED them, but it could probably explain the extreme rear camber and unpredictable oversteer I had with the JCW.

 

anyone have any issues with (aftermarket) rims being real close to the front coilover? NMs are et45, i threw a 5mm spacer up front but you can still see a slight bit of rubbing by the rim guard of the tire.
would it be best/acceptable to adjust the stock concentric nut to push the spindle as far away from coil over and then use the camber plate to set the camber?

 

How are the coilovers holding up for you? How many miles have you put on since installation?