does anybody know of or done any mods to t4's for off road use such as suspenion underbody protection and what wheels and tyres anybody using t3 or t4 syncro's or not.

Search UTube there is one i found other day cant remember. But basically old mate had lifted if larger rubber which as appeared gave it the ground clearance of a T3 Syncro on 15' Rims/Rubber.
I Suspect that the T4's just dont have the forward and rear clearance to make it a capable off roader. Plenty of plastic on those models.

if it's the one i seen just bigger wheel tyre combo. plastic its got more then coke bottle.