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RB 2pc Rotor Kit for Porsche 996 GT2/GT3, 997 GT3 & 991.2 Carrera Front and Rear Upgrade (350/350 to 380/380) (P/N 2489 & 2303)
RB Iron Rotor Upgrade to 380/380 for Porsche 996 GT2/GT3 (P/N 2489 & 2303)
This product photo is for reference only.
Our Price: $3,500.00
Sale Price: $3,150.00
You save $350.00!

Price with Selected Options: $3,150.00
Size: See below
Rotor Wt (lbs.): See below

Product Code: POR-IRK-15

RB-Brake Pad

XR70 - Racing (PD991-3R7 & PD1300-3R7) [Add $235.00]
Brake Fluid

1 Liter Motul RBF 600 [Add $36.00]

Features and Benefits
  1. Front brake are over-sized to 991 GT3 (380x34) re-use stock caliper w/RB adapters (included in the kit)
  2. Rear brake will also be over-sized to 991 GT3 (380x28) re-use stock caliper w/RB adapters (included in the kit)
  3. Purchase this car kit will save you 10% than purchase front and rear separately
  4. Best value compared to all other BBK options

This kit includes

Replacement Components
Front rotor ring: D501-04-381
Rear rotor ring: D502-01-381

Weight Comparisons
Size (mm) Wt (lbs) Size (mm) Wt (lbs)
OE 350x34 28 350x28 22.5
RB 380x34 24.3 380x28 23.1

Reviews from RB customers
Ceramic to RB steel rotors conversion
RB brake rotors and pads
Received RacingBrake rotors today! p.s I will not go back to the dealer ever...
RacingBrake makes me happy

Installation Notes:
Place spacer on spindle where caliper is mounted with RB logo and part number facing out toward the caliper. Spacers are directional and are labeled to easily identify left and right side.



Place caliper on spacer and use longer mounting bolts included with kit to fasten caliper and spacer to spindle. Refer to service manual for proper torque specifications.



After installing front rotors, spacers, calipers, and pads will naturally overhang the rotor top by about 2-3mm due to geometrical configuration, however this excessive lining can be easily removed with a dremel or grinder.

Material: Racing Formula Alloyed Gray Iron & Heat treated
Finish: Open Slot
Surface Treatment: EDP Coating w/cross cut fine grinding on brake pad contact area

Rotor Design:

Our unique and patented rotor designs make our discs cooler and last longer.

  1. Convergent vane design

    The cooling vanes are of a convergent nozzle design, which increases airflow and turbulence and makes discs cooler. (Illustration #1)

  2. Center-mount design

    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.
  3. True floating design

    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.

  4. Iron sleeve insert
RB aluminum rotors hats are constructed of aluminum with an iron sleeve insert. This allows for significant weight savings while still preserving the use of the stock emergency brake. This design is only available through RB.

Related Links:
Feature Comparison Two-piece Rotor
Two-piece Disc Surface Finish

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