Vintage ADA Head Dome Identification

[Vortex]

Thanks. ADA is running a 20% off sale right now so I'll pick up a new head with 35cc domes for 185psi. Anyone want a used head with custom domes? lol

Good call I have 2 Ada heads, one is from the 785cc superstock era, bought a new one last year and was kind of surprised to see they have improved the design, larger outer o ring groove for better sealing.