Here you go in case you are interested. They flow alot more at higher pressures because of the reduced diameter of the stem and the poppet.
Here are a couple of photos of the valve with the 1377 stem installed:
![[linked image]](http://i315.photobucket.com/albums/ll474/sonargodz/photo.jpg)
![[linked image]](http://i315.photobucket.com/albums/ll474/sonargodz/Untitled.jpg)
If you are interested in the 1377 stemmed 2240 exhaust valve, it comes with a stem and the front half of the valve, shipped US Mail for $25. Antony's Pro-Top is not included........