I wouldn't upgrade the rear brakes, unless you do the fronts too, otherwise you'll have too much braking power at the back.
calipers aren't too bad from motor factors, and you might get discount if you give them the old caliper back to be refurbished. so little weight over the back of the vi anyway don't know if it's worth upgrading rear brakes.
calipers aren't too bad from motor factors, and you might get discount if you give them the old caliper back to be refurbished. so little weight over the back of the vi anyway don't know if it's worth upgrading rear brakes.