i see why they leak, they are not flared enough and the outer id is a bit smaller than the inner id of the plastic tee. There is another brand called Apollo that im going to get and do more comparisons. It seems to have more pronounced flares for sealing.
Saleen Focus #74
-Carbon Hood and trunk
-SVT rear Disc brake conversion
-Custom fab turbo kit
-Built 2.0L by Turbo Turtle