Big Valve head - what size are the valves?

[gmw9666]

What should the size of the valves be in a Stage 2 Big Valve head?

I maybe wrong but thought they should be circa 41.4mm and 35.6mm...............with stage 3 being a bit bigger at 42.8 & 36.8

These seem to be 34mm and 40mm which from my reckoning are standard SD1 size?