Another thing to consider is that if you buy just some ebay IC core, you don't really know anything about it, or the design behind it. With my MAM fmic kit, i know i get a garret core, which has lots of R&D into making sure the air flows well and still achieves good cooling. You don't want to buy a core thats going to give you alot of pressure drop due to bad design. Not nessesarily saying go for a MAM here (you probably couldn't find one unless you got the timing right and bought it used), but i AM suggesting that you either go with a used kit thats been proven, or do your research and don't just assume one thing is like another.