StopTech Sport Slotted & Drilled Brake Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. StopTech Sport Rotors undergo a power-alloy metallurgy processing, which prevents 'thermal shock' for long-lasting durability. This part is for the Front Left position. Part number: 127.42021L.