it isnt on mine, and i have a 1.2 8v
cant see that it would affect it aslong as the belt is properly tensioned, saying that you should check you have both the correct parts.
FIAT PUNTO 1.2 1996->2000
FIAT BRAVA 1.2 1998->2002
FIAT BRAVO 1.2 1998->2002
FIAT MAREA 1.2 1998->2002
FIAT PUNTO 1.2 2000->
FIAT STILO 1.2 2001->
FIAT PUNTO 1.4 2003->
FIAT IDEA 1.4 2004->
LANCIA YPSILON 1.2 1996->
so it would appear it is correct, but why is it wider surely the cambelt cover isnt going to fit over the top of it