What is the difference between a mk2 8v & 16v axel?

[MK4_20VT]

My Dad past me all the receipts for my mk2 8v last nite & one of the many mods done is my rear axel has been swapped for a 16v mk2

It came off a 89 model mk2, the only reason I can think of the change is that the rear calipers are different.

Anyone else had this done, this has got me???

[Gambit]

i'm told that the integrated rear ARB in the 16v beam is thicker

there would be no point in swapping a whole beam just for rear calipers!!

only reason a beam is swapped is if its bent!