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Today I was replacing the vacuum hoses on the intake. I discovered there are two different sizes not counting the brake booster. I did the 1/8 I.D. (3mm) The remaining lines are little bigger and more robust. Does anyone know this size for these? Thanks for any pointers!

'99 2.5 SOHC

Edited by john40iowa
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I would guess 3/16, or whatever is closest in metric size. Take a section, cut it in the middle (where it's not stretched out from being around a fitting for the past 13 years), then match that size up to one in the parts store.

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