just realized that the previous owner replaced my hose with a one thats noticeably smaller than stock, i want to replace it but have no clue which size to get

 

for which exact line?? do you have a pic?

 

i can take one and post it up later
but the line that goes into the bpv

 

I believe it's 3/16" or the metric equiv.

 

I just replaced that line in conjuction to go with my BOV, I used 1/4" fuel line with factory clamps, as its
more sturdy/re-enforced, where as most auto parts store have cheap, thin vacuum line.

Only other line I would use would be re-enforced silicone line (like factory) in the appropriate size.