I recently had my airbox out and compared it to another stock airbox (bought to modify). I discovered the fastener anchors, which screw into the plastic airbox were all stripped, in fact some were just gone! I ended up going back to the stock box, so I used JB Weld to anchor the fastener inserts, which seemed to work well. The small bolts that hold on the cheese grater are M5 bolts, fine thread. I've been looking for some chrome bolts to replace those black ones, but haven't found them in that size yet. I would not use any thread locker (I had used Blue Loctite) on those bolts, the anchors won't hold to that pressure when removing.
Hope that makes sense.
