Tri-Symetrical curve slots dampen vibration harmonics for a quieter, more responsive brake pedal feel. Increased surface area allows for greater heat dissipation and more consistent braking. Increased thermal capacity allows the rotor to handle greater heat for longer periods of time. Heat paint markings change colour at specific temperature thresholds DBA T3 4 Performance Slotted Brake Rotor Pair Rear DBA42677S DBA T3 Club Spec Slotted rotors are ideal for fast road applications. Using DBA's patented race technologies the T3 range of slotted rotors will provide exceptional performance with smooth and quiet braking, even under the most extreme conditions. Features: Tri-Symmetrical T3 slotted rotor designed to dampen harmonics (noise), increase pad 'bite' and improve pedal feel.