well anyhow theres a rubber hose conecting to the factory air tube can any one tell me what this is and how come im not seeing it on any one else intake tube pics?[/QUOTE]
You are talking about a vacuum line. It's there on everybody's intake, but it usually connects under the intake tube so you can't see it. Don't let it scare you - you got it covered!
I think you will be fine with any intake kit, ebay or otherwise. It's not a very complicated system - a filter, something to hold the MAF, and a tube that connects to the throttle body (and the vacuum line). Extras might include mounting brackets or heat shields. Good seals and no air leaks is about the only performance requirement. I have the Stillen filter, but found a random 3' chrome tube and made it fit. Had the Stillen Z-tube before this one and my current, "generic" set up performs just as well, if not better. Good luck and definitely take pictures!