yep , i had a the large 1/4 inch plug on the victor x manifolds , come out on me while i was driving and i had to shut the car off and start it in first then shift reallly fast becuase it was like 75% the whole time , would rev asll the way to rev limiter. Was crazy. Never open one of these manifolds and just slap it on , becasue the plug had threadlocker all over it so i assumed that the plug was tight and never checked it , but about 5 miles into the first test drive of the swap it came out. So ill never make that mistake again.