I found these rubber "stoppers" at home depot that work pretty good so far
link to the ones i used ->http://www.homedepot.com/p/t/202209567?catalogId=10053&langId=-1&keyword=stoppers&storeId=10051&N=25ecodZ5yc1vZ1z8&R=202209567#.UWsSonD5hvc
That is the best fit size, just a little wd40 and a good push they go right in and inside the port just take a razor blade and cut off the extra rubber that is hanging of.
This is how they sit in mine, it has allowed be to completely delete my TVIS (since i made my own manifold)

Some closer looks


I have driven around with them in and my car at full temp along with some full throttle pulls and havn't had a problem. Later this year i will be doing a drive up to fresno (i live in so cal). I will report on how they will hold after a long trip.
