I need to know what size vacuum hose (mm) to get. I want to replace mine with blue but there's 3mm 4mm and 5mm hose on ebay, but i dont know if that measures the diameter of the opening or the thickness of the rubber or the outside diameter of the hose. So.......... I need to know the inner and outer diameter of the stock hose and the thickness. Anyone know this? I know this is OBSCURE info! Please help a brother out.

there are different sizes of hose you may need depending on how much you want to do. all the vacuum hose i've seen specified the inner diameter as the size.
these are nice, but not cheap kits..http://www.hosetechniques.com/catalog_products.tpl?cart=1160654660992034&category=Car%20Model-Specific%20SVH%20Kits