The difference between the brakes are as stated the vented rotors and on the ifs caliper the four pistons are the same size where as on the solid axle it will have two big ones and two smaller ones. If you want to run vented rotors on your solid axle you need to run fj80 rotors and to run the calipers you either need spacers or grind down the colling fins
That is what I was looking for. I think I will do that, because the rotors are a little rough anyway. I will use the IFS calipers with the FJ rotros. Next question is what years on the fj rotors? Thanks for the help.
