My large bushing in the trailing arm on my 06 forester has perished and is making a noise. Should I rebush the existing arms or can I fit a pair of hardrace arms from an Impreza? I was thinking of something like this:

https://www.ebay.co.uk/itm/222091426269

 

will they fit or will they totally alter the geometry? 

Otherwise the other options are to rebush the existing arms or buy a pair from Subaru I presume? Anyone know how much OE trailing arms cost?

 

They would fit but if your trailing links in good order I would just rebush them with strongflex bushes .

http://www.strongflex.eu/en/subaru-forester-sf-97-02/361-rear-tie-bar-to-hub-front-bush-5902553515077.html

would do the hub bush too if looks poor .