the Q is what size 9mm & 15mm fittings looking into the cusco can, anybody got any pics of 1 fitted and any info please??

 

isn't 9mm for N/A cars and 15mm for turbo applications?

 

Depends on how many port you have on the catch can.

If it one in one out than the 15mm is probably the one.

If its two or three in one out then a 9mm will do no problem.

My Hyperflow OCC has two 9mm in and one 9mm out.

 

Neither size are right. All Subaru oil breather lines are 1/2" or 12-13mm.If in doubt go for the bigger and use wider hose, if you can actually get any of it that is.