Is there anyone here that is running flat top ***anium valves with 5/16 stems?? If so, I would like to talk. Email or PM me.
I'd be surprised if they made them. well, i guess it depends on the engine. What engine? And, yes, i run ***anium valves - not on a street motor and they are flat.
We run .310 stems in our circle track stuff........Int 2.180-2.200 and ex 1.625...... 86-9200 rpm.... 100 laps at a time ....1000-1200 laps between rebuilds Tony
Run both 5/16 and 11/32 stem Manleys in 1600 hp nitrous motors for years. Strong and forgiving, along with light weight. Spin bbc to 9400 all the time.