Hi Nilesh,
There are a couple of arms on each bumper that extend into cutouts in the chassis rail. There are 2 bolts in each arm that you get at from underneath via some more cutouts. If you're lucky the bolts will come out OK. If you're unlucky, like I was, the nut breaks its weld and it turns into a b*****d of a job as its next to impossible to get at the nut
I think it was 17mm for the bolthead. If not its 19mm, can't remember which.
Good Luck
