Quote Originally Posted by Samiam1017 View Post
I have 06 Wrx heads on my block and I had two of the filters. I replaced them didn't clean them. Wasn't cheap I remember. But everything's new or remanufactured on my motor so I thought it would be best to replace.
Well, not knowing the maintenance history of my donor, and reading some of the horror stories, makes me want to check/change them to be sure!