This kit is the same thing the pros use and is great for the street and track. This kit includes four-piston Ferrari F40 calipers and pads for the rear, cross drilled and slotted 13.28" front discs, stainless steel braided brake lines, and hats and brackets made specifically for the Supra. This kit will decrease your stopping distance by up to 35%! The actual kit is pictured.Please note that 17" wheels are required for you to be able to fit these rotors & calipers underneath your Supra. Please note that on this kit the rotors a cross-drilled AND slotted. Brembo does not offer these in cross-drilled only or slotted only. They are available only as pictured here.This 2-piece system rotor system weighs in at a significant weight saving as compared to your stock rotors and calipers. Your Supra TT OEM calipers weigh 29.0 pounds. The Brembo weigh 22.0, saving you 7 pounds of sprung weight. Your smaller Supra TT OEM rotors weigh 38.2 pounds. The Brembo 13.28\" rotors weigh only 30.4 pounds, saving you 7.8 pounds of sprung weight. As you may know, sprung weight (rotating weigh like your flywheel, rotors, pulleys) slows your car down 10 times more than unsprung (stationary) weight. Upgrading to the 13.58" Brembo kit will save you 148 pounds worth of stationary weight!Billet aluminum hats are application specific and have been individually machined to engineering specifications. The copyrighted Brembo design of the rotors & calipers creates what they call a floating disc which reduces heat related stress and tremendously improves brake performance and pedal feel.