Didn't the old nozzles produce a whistle that stopped when it was getting full? I don't have problems from expansion because I always listen for the noise in the pipe. The only problem I have is trying to hear when someone has a radio blaring away.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!