They were very easy to install. I cleaned out the hub ball joint knuckle with a steel brush, some 400 grit sandpaper, and some brake cleaner. A little synthetic grease and 2-3 taps with a dead blow mallet and the ball joint seated. The machining is pretty nice, bushings are stiffer than stock, and the rear bushing isn't the split design like the oem. I took pictures and was planning on posting my install, but my micro sd card committed suicide. Only time will tell how well they wear, but I have no doubts. Oh!.. and if anyone was wondering, I did take measurements on the set I installed and they were very close to the factory control arms. As long as you clean up any corrosion and make everything relatively clean, then these should be an easy install for you as well. If nothing else you are removing the weakest link in our suspensions and getting rid of some slop and added weight in the process. Also, the passenger side pinch bolt broke on me like most people, but the driver side did not. I soaked the driver side down with PB Blaster once a day for three days and it zinged right off with an impact. These control arms did come with replacement pinch bolts. I drilled out the broken bolt and replaced with a grade 8 bolt, two washers, a lock washer, and a nut. Screw oem! Dear Subaru Engineers, If you are reading this, lick me where I $#!t! That is all.