What exactly is aluminum about the series 5 engine rotors? I know they are 1/2 pound lighter and this is supposed to be because that they are made out of aluminum. I can stick a magnet to all of my S5 rotors and one that has been sitting around for a while has rusted on nearly all the surfaces I can see. They are definately all S5 rotors because I weighed them on a certified scale and they are very close to 9.54 pounds.... unlike the 10.04 pound S4 rotors. I'm just curious here exactly Mazda hid the aluminum.

Cooper Lacy
lacycw@rose-hulman.edu

 

Never heard anything about them being aluminum. Theyre just like all the other rotors.

GSLSE rotors are 11.5lb while 86-88 rotors are 10.5lb, but you're don't believe they're titanium do you??