ALK (Anti-Lift Kit) install on 02-07 Subaru WRX/STi:
4.) Break loose the bolts first, and then the nut. Don’t remove any fasteners until all of them are loosened. I broke loose the nut with 2 wrenches coupled together for extra leverage. After fasteners have been removed, you can pull (or pry) the control arm downward to remove the original mount. If you pry,never pry on a mating surface. You’ll have to buy new control arms and used they go for $250 per pair.
5.) The two mounts side by side for comparison. The sticker says exactly what it means (in reference to their installation positions).
6.) Lube the ALK bushing. Thoroughly clean the area to which it will be installed on your car. You don’t want parts to wear prematurely.
7.) The next part will be frustrating. There is a way to do it. You have to get the new mount into place without damaging things too much (including yourself) and get it past the transmission crossmember.