Quote Originally Posted by hahnmgh63 View Post
As SzymekCRX said those are just Crankcase ventilation pipes (inline in each of those pipes is where I have my Catch cans). They are not pressurized (well, sometimes just a little above ambient but not boosted) pipes so they don't have to have a super tight seal as a boost pipe.
Exactly - no boost, because they're connectd right BEFORE the turbo