The pipe seem very small, it'll probably work but I rather get one from a well known brand like Injen, Apexi, etc... If you look in the buy/sell section, you can find a used one for around the same price as that ebay crap.
Just put a k&n filter on the end if it doesnt come with on. Prolly room to get a longer filter on it as well.
Only problem I ever encountered with using ebay piping was the polish came out pretty easily after a single simple green treatment on the engine. Since there is no v2 from aem, or weaponR dual chamber intake they all seem pretty equal in quality if they are all standard 3" piping throughout.
I don't know about it but CAI is just a piping IMO wouldn't really matter too much. You could always go to home depot buy 3" pipings and the rubber coupler and get a K&N filter at some autoparts store for like 70$ =P