Sounds like a P22 Polaris - guys riding around with a bag of spare bolts.From the little bit I have worked on friends' Subarus in my shop, I don't think I would touch one. One buddy keeps a spare bag of lug nuts in his glove compartment because you usually strip a couple when you take your tires off he says. I stripped two when taking the tires off. Properly torqued. I've never heard of stripping a bolt undoing it