So what is that bit then? Just curious! He he. And what issue would it cause if it was not filled? I have some leftover RTV or silicone sealer (can't recall which it is) from when I 'Joey Modded' my lights. I will fix it this evening.

I am not too concerned with the fuel economy. 50KM isn't too bad. I plan on getting the exhaust leak checked out later this week too so hopefully that will fix that. I put the CAI in more so for the power increase, which I did in fact notice especially in the higher RPMs.

Thanks for the quick response!!!