I have the Vectra C mod done for a few months now, however ive never been happy with the fitment of the rubber connections to the airbox.
I dont think they are a tight seal around the joins.

I was thinking about getting some of this just to join the vectra intake to the airbox.

http://cgi.ebay.co.uk/1Mtr-76mm-Flex...d=p3286.c0.m14

What do you guys think?

And has anyone any idea of the size i would need to fit the intake and the airbox?