Thanks for the info, but intercoolers do NOT void the warranty. I have no idea where you got that idea. Here's the one I got for my 360:
http://www.nyko.com/Store/ProductDetail.aspx?i=71
It plugs into the power jack in the back of the box, hence it is not necessary to open the Xbox and break the seal.
http://www.nyko.com/Store/ProductDetail.aspx?i=71
It plugs into the power jack in the back of the box, hence it is not necessary to open the Xbox and break the seal.