Hi All,
I wanted to share this information for people who may also be installing a catch can. Be careful when tightening the piece below as the threads separated and became stuck in the engine for myself and at least one more person on this forum. I ended up putting silicon on the seal and it seems to be working (500+kms since install).
On a positive note Mishimoto has shown me support throughout this small mishap and I have no doubt it will be purchasing more product from them in the near furture!