I have the Westin Pro Traxx 5. Cant imagine going any wider, they have been great. I think the stock ones are 5" but not 100% sure so I will let the others chime in.
I thought about the wheel to wheel but went with the wheel to cab model. I do not think the extra little bit of bar to the back wheel justifies the price increase and I do like how the non wheel to wheel ones look a little better. Nothing modular about the ones I have. One long bar with a few brackets and covers to the brackets.Are yours w2w? I see Westin calls those “modular” and cuts down on shipping costs and I wonder what all that means.
edit for spellzing