Posted by Rob Steller on July 06, 2000 at 10:53:22:
In Reply to: 265 seat inserts posted by dale on July 05, 2000 at 19:35:35:
My '57 Service manual shows the 251 and 265 ex valves at the same diameter. There can be a difference in the valve stem diameter due to the use of sodium filled valves, and hence a change in the guides as well, but this only applies to the very heavy duty setup, not needed for our PW applications. Rob