just finished fitting some new rear discs, then looked at the instructions as you do when you're finished, and it said to have the grooves going forward but with a 50/50 chance yes i got it wrong. so my question is will it make much difference? should i just leave them as is?
Might be noisy and obviously they have been developed to work in that proper rotation I would be inclined to swap them round its only remove wheels and 4 bolts after all ......
and obviously they have been developed to work in that proper rotation 
I would be inclined to swap them round its only remove wheels and 4 bolts after all ...... 