Mine's an '18, I live in America. I've seen other people talking about different MK numbers, never understood what they were talking about. So a VT big mouth will fit on my '18 ST? On my E30 tuning, it seems like it might be running out of air, seems like it should run a bit better than it does, doesn't pull nearly as strong as my '17 Focus ST did, and I did have your VT big mouth on that.