Curious about Tickford head

[mash again]

Just wrecking a standard EF with factory gas (tickford did the factory gas) and the head has a big tickford T on the front, have wondered if its just to do with the gas and what changes were made from factory.

[trick_xd]

Nothing special about the gas or the head that its on gas ..
If it has the big T On the front of the head then yes it's a tickford head and that means it has 1mm bigger exhaust valves and tuffer valve springs to go with a very slightly bigger then stock cam