Like any lowering application if you lower the car much more than an inch (25.4mm) you start to kill your camber curve(geometry) resulting in more of a push(understeer).
If someone says" i just want my car to be LOW and dont care how it handles", then sure lower away.
For this set up NO LCA are not needed if you stick to the 20-25mm lowering range. Yes you should get WL rear camber adjustment bushings so you can even out rear camber at a minimum.
SIDE NOTE:People seem to be stuck on replacing rear control arms yet dont replace the FAR MORE important upper control arm bushings that have 4 , soft, bushings that hold the 2 heaviest arms to the rear of the subframe. So yes those who replace rear control arms and did NOT replace those upper bushings have only put MORE pressure and strain on the upper bushings. Lets see Whiteline rear camber adjustment bushings cost 150.00 and rear control arms are 550.00.
Anyway....the only parts needed to install these coilovers are the OEM conical washer that I posted on the previous page. Thats needed for use of OEM, GROUP-N, and COM-C front mounts. The rear can use STOCK mounts.
These shocks come with a slight slot on the front struts so use the stock bolt to adjust camber as it does NOT Stretch like the WL camber bolts do. STOCk can be tq-ed to 140 ft lbs. WL's stretch above 85 ft lbs.
Hope that helps.
Myles