What is the size of the stock vacuum line on a MCS? I'm installing a boost gauge and would like to have the fittings ready when I take the intercooler off. The gauge came with a tiny line and a fitting to get it to 1/8" NPT or 1/4" NPT. I'll probably get everything in brass so I can keep those. Is the stock line 1/8, 3/16, 1/4...???

 

5/32. The standard soft vac line will be 5/16 OD, 5/32 ID.
I used the small hardline that came with the gauge, but after breaking it twice at the gauge fitting, I'm wanting to swap to soft line. Anyone know if there is a 5/32 vac nipple that will fit the back of the gauge?