I just bought a used Stillen Hi-Flow and a carbon fiber Z-Tube and I am thrilled. However part of it does not seal off (I believe it is the exhaust connection, see pics). I could get a new grommet, or maybe find some high heat glue to get the grommet to seal on the curved tube surface. Does it need to be completely sealed off?
Thanks guys...

 

it is a vac line it sould be fine

 

My main concern is that with the grommet passing air my intake would be taking in air not through the air filter.

 

install it and run you fingure around it to see if there is any suction, if there is then use some silcone or something to seal it up but im sure you wont need to

 

There, you should connect the crankcase breather hose (black ~1” tube) that on the other side is connected to the valve cover in the rear of the engine on the driver side.

Unless you have put a small breather filter to that hose or oil catch can (which is unnecessary IMO because there is no oil to catch on this side), in which case you should close “the grommet on the curved tube” by putting the 5/8” nipple ($0.25 at any auto parts store).