StopTech Slotted Sport Brake Rotors are premium one-piece replacement brake discs for factory brake systems. This part (126.47021SL) is a single Front Left Slotted Rotor designed to improve braking performance by wiping away debris and gases. Features include a unique power slot pattern and an e-coating finish for corrosion resistance. Note: This is an individual component. Related parts for a full front axle upgrade: 126.47021SR (Front Right Rotor). Specification: Diameter 294mm, Height 56.5mm, Thickness 24mm.