I was looking for a less expensive source of vacuum gauges than autozone, and I came across an interesting selling point for this vacuum hose:
http://www.acehardware.com/product/index.jsp?productId=1288643&cp=&kw=vacuum&sr=1 "Resists heat, vomiting weathering, and ozone"
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'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner