The Ultimate OE-type
replacement brake rotors for BMW.
FRONT for all E36 328, 325, 323, and E46 323 (not cabrio), Z3 2.5/2.5i/2.8
ONLY FOR MODELS WITH ORIGINAL PART NUMBER 34116855153
PRICE PER PAIR
UUC recommends Low-dust Hawk
Performance Ceramic brake pads available
for ordering with rotors.
What makes the best brake rotors?
Details, details, details, and value!
UUC Ultimate OE-size replacement rotors are slotted, plated, and
manufactured using the best techniques and materials.
Slotting: there are many reasons to slot rotors. Primarily, slotting
aids in removal of water and debris on the rotor surface, evacuation of
hot pad "off gassing" vapor, and provides a visual wear indicator.
Details: These slots do not extend all the way to the edge of the rotor
for a very specific reason; this maintains the structural integrity of
the rotor. Other brands with slots all the way to the end have created
"stress risers" where cracking may develop. No such problem exists with
this design. Additionally, directional slotting enhances effectiveness.
NO DRILLING! Drilled holes in rotors often used for "show" are prone to
cracking and catastrophic failure. The holes create stress risers which
will lead to this sort of failure. Additionally, drilled holes do not
improve cooling, rotary-vane rotors lose efficiency when drilled
because cooling air does not not pass through the rotor
circumferentially but is instead prematurely evacuated by the holes.
Plating: Multi-stage plating resists unsightly corrosion on the
rotor hub and unswept areas of the rotor face.
Precision: due to the ultra-precise tolerances used for run-out,
parallelism, and surface flatness, absolutely no pre-installation
machining is required for smooth operation without vibration or shimmy.
Manufacturing details:
- Meets SAE J431 standard for grade 3000 gray cast iron
- Alloying: Copper and Chromium added to achieve specific
hardness and tensile strength.
- Precision-controlled cooling during the casting process creates
a uniform distribution of graphite flakes, thus increasing wear
resistance and the ability to dissipate heat. In contrast, premature
cooling of cast iron can cause iron brittleness, thus making the brake
rotor more likely to warp or crack, especially when overheated under
hard braking conditions.
- Run-out less than .004".
- Parallelism of machined surfaces within .0005" tolerance.
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