Post by
jstck »
https://forums.nicoclub.com/jstck-u276167.html
Thu Nov 16, 2017 3:29 am
For that application, you won't need reinforced vacuum lines. Regular plain old rubber ones will do. If you care about how it looks, you can get silicone hose or something, as long as it is a vacuum hose it will do nicely. As long as you don't use something like windshield washer hose, you should be fine (as that can collapse under vacuum, blocking the line).
AFAIK, reinforced lines would mainly be useful if you have high boost pressure or they need to withstand stress or wear better.
Most of the vacuum lines are 4mm inner diameter (I think that's about 1/8" in heathen units). The exceptions are the lines going to the brake booster, the charcoal canister (both of which I think are the same size, but forgot what), and the PCV hoses (if you count those as vacuum lines). There's lots of them, I have no idea how much they all add up to. I got a 3m (~10ft) roll for the equivalent of $7, and that was easily enough to replace all of the 4mm stuff on my KA24E engine (think I used about half of it).