05 Rear sti struts are prone to lots of noise and seem to wear out too quickly. NevadaSTI had his making noise around 18 miles or so and he doesn't off road his car like i do.
you may consider a coilover solution. like Sperry said you will have a strut matched to your spring rate for certain. and you'll be on new struts
springs don't really wear out, but struts sure do
my 2 cents (may actually only be worth a hay penny though
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