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Cool. I bought the parts to make my tubes, but I bought 2" end caps thinking I had 2" pipe, and I actually have 1.5" pipe. Not sure why I thought I had 2". So I need to return my caps and get 1.5" caps. Ended up spending much more than I wanted to, so I hope this works. I ended up buying PEX parts for the nipples in the tube. They're threaded on one end and have the nipple on the other, and my vacuum hose I bought ($3 a foot!) fits over it well. I think. We'll see how it goes. I'll update when I've got it installed.
Right now I am testing my first aero mod, which is just a simple grill blockoff in the bumper, so I want to see how that goes before I do these vacuum tubes. I don't have any instrumentation in the car to track fuel efficiency, so its just simple math when I fill up.
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