THESE ARE FOR THE 4 POT FRONT BRAKES ONLY - Price is Per Pair (2 of) Two piece rotors have been the exclusive lair of top dollar high end road racing machines for years. From LeMans to Daytona and on road courses through out the world, a two piece rotor design offers the ultimate in heat dissipation and performance. Project Mu of Japan is now semi-mass producing their 2-piece Supra rotor kit (price is for a pair) which comes slotted. Slotted is preferred on street cars as it does not significantly reduce the surface area available for braking. Two piece rotors have been the exclusive lair of top dollar high end road racing machines for years. From LeMans to Daytona and on road courses through out the world, a two piece rotor design offers the ultimate in heat dissipation and performance. Project Mu of Japan is now semi-mass producing their 2-piece Supra rotor kit (price is for a pair) which comes slotted. Slotted is preferred on street cars as it does not significantly reduce the surface area available for braking. An OEM Toyota Supra TT rotor weighs 21.75 pounds. This Project Mu 2-piece rotor weighs 17.54 pounds, a savings of 4.21 pounds of rotating mass per rotor! That is a savings of 8.42 pounds just for the front. Remember, when you save rotating mass you can multiple by 10 for your real savings! So upgrading to these rotors has the same effect as removing 84.2 pounds from your Supra!