I need to replace the rear trailing arms on my 2005 wrx wagon, and I can't work out what size I need.
Should they be 40 mm od or 41 mm od?
This kit:http://www.superpro.com.au/show-prod...rphan-SPF1907K

Or this kit:

http://www.superpro.com.au/show-prod...rphan-SPF2810K

Or doesn't it make a difference?

 

Having contacted a few sellers I've gone for the 40mm (SPF1907K).

 

http://www.scoobyworx.com/superpro--...rg-12568-p.asp

seems to me they use the 2810 .

thats the kit for a 2004/7 blobeye/hawkeye

 

This is why I was getting confused. AS Performance and ICP both said the 40mm SPF1907 (I emailed them both). Scooby worx say 41 mm and the superpro website says either.
So I've gone for the 40mm. I'll let you know how it works out on the 15th...