i presume its a gti dude?
-GTI 8v without cat = 'PB' (common)
-as above with cat ='PF' (rare in uk)
it is stamped on the front of the block, just below the head and above the distributor, but its quite tricky to see as the rust normally eats at it lol
its in the logbook as said, aswell as being on a white sticker attached to your boot floor.
