Classic top hose diameter
 

Hi, does anyone know the internal diameter of the top radiator hose on a classic import STI? Car is a 1998 V4 is that is relevant - no access to the car just now but need a water temperature adaptor.
Used search but couldn't find anything.

Thanks in advance

38mm internal diameter. You'd be well advised to buy a new top hose to do the job...I didn't, and manipulating mine split it, so it leaked the next day:(

Superb, thanks for that :)
Think the guys at GI Motorsport have it all in hand.