Front Left Cross-Drilled Brake Rotor, StopTech - E82 135i, E82/E9X Performance Brakes
Performance drilled rotor is a direct alternative to BMW part #34116786392 and 34116778647.
338x26mm rotor fits stock E82 135i front brakes.
Also fits the factory BMW Performance sports brakes installed as a retrofit on E82 128i and E9X 325i/328i models.
This is a Left Front rotor.
Cross-drilled rotors are used mostly to enhance the performance aesthetic of your car. Slotted or blank rotors have greater capacity to store heat so we prefer those for track and racing use. Cross-drilled rotors still have their place as a design that looks great with no detrimental effects under normal street use. Many sports car manufacturers still use drilled rotors because of their sporty looks while knowing they don't lose any effectiveness during normal driving. The holes into the vanes do offer an advantage in wet conditions where the water has an easy escape from the rotor surface. StopTech Drilled rotors are made using Centric High Carbon blank rotors. A black electrostatic coating is applied to prevent rust on the brake hat and vanes. The entire rotor is coated, followed by CNC double-disc grinding and drilling of the friction surface and final computer balancing.
StopTech is an enthusiast-driven manufacturer of replacement brake components, brake upgrades, and Big Brake Kits. Since their beginnings in 1999, StopTech has operated under a "better than OE" approach to design and manufacturing. Most obvious is their electrostatic anti-corrosion coating that signaled the end to cheap, aftermarket rusty rotors. Under the surface, every StopTech slotted rotor is CNC machined from a High Carbon blank disc. The High Carbon approach results in a brake disc with greater capacity for heat absorption. This results in less deformation of the braking surface, aka "warping", better resistance to surface cracks, and greater performance overall.
E82 / E88 (08-13) > 128i
E82 / E88 (08-13) > 135i
E82 / E88 (08-13) > 135is
E90 / E91 / E92 / E93 (06-13) > 325i
E90 / E91 / E92 / E93 (06-13) > 328i