+1 for the SiFab kit. It's relatively easy to fit although some of the bolts can be fiddly to install and tighten fully.
One word of caution.
Clean any underseal off the chassis rails before you fit the cross member.
I didn't think of that at the time and I noticed when I checked everything, after a hundred miles or so, that the bolts had lost some of their torque due to the underseal being compressed and squeezed out slightly.
That would ultimately allow the cross member to move slightly under load and possibly fret the bolts or even elongate the holes slightly.
To those who have already fitted them without removing the underseal. Check the fixings are all still fully torqued up.
I haven't heard of any problems but good practice IMHO.
As for handling performance. You will notice a significant improvement. More so than the brake reaction stays on a 4/4 in my opinion.
