I also used siliconeintakes.com for the rubber connectors used in my homemade 4" CAI. I retained the stock airbox though, since after modifying it, it's proven itself to work just fine in datalogs.
I do have an LS1 electric fan setup though...Well under $100 total investment for the CAI.
http://www.fquick.com/images/vehicle...1203342736.jpg
http://www.fquick.com/images/vehicle...1203346268.jpg
