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RB Two-Piece rotor (Open Slot) - Z06 REAR 06-12 PAIR
Rotor Material: Racing Formula Alloyed Gray Iron & Heat treated
Machining: Slotted
Surface: EDP Coating w/cross cut grinding on friction surface
NOTE: These two-piece rear rotors are made with the latest technology that is exclusive to RB. The rotor hats are constructed of aluminum with an iron sleeve insert. This allows significant weight savings, while still preserving the use of the stock emergency brake. This design is only available through RB!
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Weight Comparison
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| One-piece |
20 lbs. |
| Two-piece |
16 lbs. |
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Weight Savings: 4 lbs.
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Click here to learn how RB two-piece rotors are built differently than the competition.
Replacement Components
Rotor Ring: D308-01-381
Fasteners: FK1
Installation notes:
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Trim the back plate edge approximately 2-3mm (0.1") to avoid interference with the rotor hardware. |
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When installing new rotors you may notice the interference with the pin bolts (outboard side) are in contact with the rotor surface causing some grinding noise and grooving marks on the rotors. (while inboard side has about 2mm space)
This was caused by the misalignment of OE calipers relative to the rotors. We have found out by shimming 1.0mm washer (between the caliper mounting tab and spindle) will satisfactorily make the caliper align with rotors and eliminate this interference issue.
You may not notice this interference (caliper and rotor mis-alignment) especially after the rotor and pin bolt worn down, however we highly recommend to have this alignment corrected the sooner the better to assure optimal performance (no matter it's OE or aftermarket rotor new or used). |
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Remove the caliper pad clips to avoid interference between the clips and the fasteners. |
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Tighten emergency brake to reduce shoe diameter by 0.5mm to allow for fitment of Iron-lined Hat. |
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Dowload or print PDF version of this installation guides. |
Material:
- Alloyed iron formula adds strength and heat resistance. Heat treating further improves rotor performance for a more uniform and stabilized microstructure.
Design:
 The cooling vanes are of a convergent nozzle design, which increases airflow and turbulence and makes discs cooler. (Illustration #1)
 The center-mount flanges for hat mounting to the rotor ring have several benefits. (Illustration #2)
- It allows the ring to be used on either side of the vehicle simply by mounting the hat on either side of the ring (unidirectional).
- The stress load transferred from the ring to the hat is balanced.
- Air inlets are widely open to both inboard and outboard sides of the rotor. More air suctions and even temperature on both sides of the disc surface.
- Heat transfer from the disc surfaces to the hat is even and minimized by increasing the flange length and the airflow around the flanges.
- Mounting flanges are on both friction surfaces ultimately provides excellent heat balance.
- Exclusive full floating design with 10.9 grade alloyed hardware. Hardware is DACRO coated and crimp locking. DACRO is highly corrosion resistant and provides a film for easier movement between the hat and rotor ring as disc expands and contracts and the crimp design provides positive engagement without rattling or torque loss at temperature.
Related Links:
Two-Piece Feature Comparison Chart
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