Something you guys should understand about the VWoA parts system, is that the numbers cast into the head NEVER directly correlate to the actual part in the parts system.
Quick primer:
- First three digits indicate the car it *may* have been originally designed for. 111=original Beetle, 131~Super Beetle, 171 = Rabbit, etc.
- Second three digits indicate parts group. 103=engine head, 121=cooling system, 9xx=electrical, etc. Anything ending in 98 is a kit of parts (e.g., 198=engine kit, such as gaskets).
- Third three indicate specific part number.
- More importantly, though, is the letter suffix(es). These are the key parts for within the parts system and make ALL the difference in the world.
So, for your casting part number 056 103 373 all that says is it's a head. You CANNOT rely on that number to give you specific application info, as that casting could have been used for any multitude of applications, possibly never even for whatever car is indicated by the 056!! Never, EVER use a casting number - whether it's engine, electrical, plastic, trim, or whatever - from a VW to nail down its original purpose.
But, if you give us more details on the head, such as better photos of intake, exhaust, and combustion chamber and cams, I'm sure this crowd can identify it.
GA, former VWoA parts manager...
