So i have the common rear strut knock on the drivers side of my 05 wrx. Now, i figure that i might as well do all the struts while im at it considering the stock ones have 152xxx miles on them. I was looking at some write-ups talking about top hats and mounts and them being a necessity. Anyone care to shed some light on whether or not i can buy struts that will use the stock mounts and tophats? I was looking at KYB Gr2 and was wondering if i would in fact have to replace everything.