Triumph GT-6 MKI / Vitesse cylinder head. I got this for my MKII before realizing it was a MKI head and wont work for me. It's been Magnafluxed and soda blasted clean. The machine shop said it likely was skimmed, measures in at 3 3/8".

Includes the rocker assembly in the photos: shaft, pedistals, springs and rocker arms.