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.
This rotor is the same specs as what was originally used in the sports brake retrofit kit used on 128i/325i/328i models. The rotor is cross-drilled and slotted for better performance with sport pads or in the rain. Since it's the same dimensions as the stock 135i rotor it can be used as a great aesthetic and performance upgrade on the 135i.
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 N54 (08-10)
E82 / E88 (08-13) > 135i N55 (11-13)
E82 / E88 (08-13) > 135is N55 (11-13)
E90 / E91 / E92 / E93 (06-13) > 325i
E90 / E91 / E92 / E93 (06-13) > 328i