Better than OEM
side by side, yes there's a larger inner diameter. I also noticed my OEM gaskets to be a little tattered, or rough on the edges from being in the air stream. They are metal with rubber so the rubber was more affected but still... Also make sure to torque intake bolts to 6 ft lb, not 18. If you read the manual wrong, you're gonna have a bad time. I stretched a few bolts and broke one.