https://forum.ih8mud.com/showthread.php?t=13031 thats the post im following to change out ALL of my vacuum lines. question... what sizes/part #'s do i need? ive picked up this much so far. "90999-92003 600mm (approx. 12 @ $2.20) 90999-92004 900mm (approx. 3 @ $11.07)" problem is, when i call the parts place up, they tell me both 92003 and 92004 are pretty much the same size. arent there basically two different sizes...3.0mm and 5.5mm? i only see two different sizes in there. whizzzaaa?