I ended up putting this exhaust on my car last night from another bloke that lives near me. He says it’s off a 2009 wrx sedan but I think it may be later. Any way of telling what vehicle/year it may have come off. I’m trying to do some research as I’m now getting a low rpm drone in the car that wasn’t there previously. I would have thought decreasing the exhaust diameter would have made the drone more bearable which it does not seem to have done. Any suggestions.