I don't think it would be necessary... I have replaced the rear shocks once (with Koni FSD's) and the upper shock mounts a couple of times on my E46 330ci and never had to align the car. You really don't disturb anything that has anything to do with the alignment.Heck, if all you are doing is R+R ing the shocks, you're not even affecting the ride height. I say put them on and go with it. I hate to admit it but I have replaced the lower control arm bushings on my E46 and not done an alignment. The car drove just fine after putting the LCA bushings on so I let it go. No crazy tire wear as of yet (about 3k miles). Just trying to save some $$$. Cheers!
