Hi,
This is a newbie question so please accept my aplogise to start with can some one please identify what the following does on the T5 fuel rail




Also in the next pic you can just make out the fpr and you cn see the vac line am I right in thinking that the fuel supply goes in the other end of the fpr (again please accept my aplogies I am doing a conversion and am normally used to carb engines)



Many thanks for any help and advice

 

Also does anyone know the thread type on the connection?

 

Gone an worked out from doing some searches

the 1 st pic is he fuel inlet,
2nd pic is fuel return to pump



Still need to know fitment size??