Decided to pull my airbox and intake off over the weekend. Pulled out the MAFs and gave them a good clean and then did a ECU reset. Can runs much smoother IMO..
Anyway, When the intake was off noticed that one of the airbox supports were missing and there was a hole in the manifold. Pic below

Car runs great but I'm not sure having a open hole in the manifold is a good idea?
Should I plug it up?
Cheers, John