Correct camber after Lift
 

The 2008-2011 Subaru Impreza (I assume all models but I have the wagon) does not have a way to adjust camber on the rear suspension. Is there a DIY way of adjusting or adding camber adjustment? If adding a camber bolt, to which control arm?

It has multi link suspension, so has no need for camber adjustment. You can google how it works, but my understanding is that rear camber increases as cornering force increases. I'm sure someone else will be along to explain the detail

Never fails that status quo answer is that the question is wrong.

Unlike previous models, the 2008 on models do not use rear struts so using camber bolts is not a simple option as previous.
How have you "lifted" this wagon??
The Crosstrek /XV is basically a lifted wagon and has different trailing arms and upper arms to allow for the increased travel.
Driveshafts appear to be the same.

It may be possible to make/ use camber bolts for the upper double wishbone arms to subframe mount but whether there is enough movement/adjustment ??

https://cimg3.ibsrv.net/gimg/www.sco...25b513b281.jpg

​​​​​Yes, the wagon is lifted with 1.5" spacers at the top of the spring/shock assembly (strut?). Another detail is that the trailing arms were lengthened and camber bolts were added at the ends. The wheels sit square in the wheel wells. I ended up with around -3 camber and rather than only bending the trailing arms, I could add a camber bolts as you suggest or maybe on the outboard end of the lower control arms?

https://cimg4.ibsrv.net/gimg/www.sco...b506cf4435.jpg

Would have been nice to look into replacing the suspension parts with those from a Crosstrek/XV, but that's not as easy to find as in USA where you just stroll over to Pick-n-pull.

The 17" wheels came with the car. I thought of replacing with 15" wheels but just changed the tires from 45 series to 55 series. That isn't relevant but I preemptively answered before the status quo says something.

I never said that at all. Hopefully Don has answered your question, as I suggested someone would.

You have lengthend the trailing arms to account for the cars new height? I suppose calculations for this where done and a jig was made to make square,
Under compression.