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RB Big Rotor Kit (370x34mm) Retrofit to Cadillac CTSV V2/Camaro G5 ZL1 6 Pot Calipers for All Model 3 Front
RB Big Rotor Kit (370x34mm) Retrofit to Cadillac CTSV V2/Camaro G5 ZL1 6 Pot Calipers for All Model 3 Front
This product photo is for reference only.
Our Price: $1,500.00
Sale Price: $1,425.00
You save $75.00!

Availability: Usually Ships in 4 to 6 Weeks
Product Code: 2609-K

This BBK rotor kit is exclusively developed by RB to retrofit Model 3 to Cadillac CTS-V V2/Camaro G5 ZL1 6 pot calipers allowing you to upgrade to 370x34mm heavy duty rotor (vs. Model 3' 320/355x25mm with a 4pot caliper).

1. Modification required:

You must enlarge 2 of the spindle caliper mounting holes from M12 to M14 (14.0-14.2mm) in order to install the 6 pot caliper which has M14x2.0 thread hole. (M14x2.0 caliper bolts are included in the kit)

Caution! this process is not reversible, in other words after you enlarged the spindle holes you will need to insert a sleeve (1mm wall thickness) in order to put the stock calipers back.

2. You must acquire CTS-V/Camaro 6 pot calipers for this installation:

Calipers can be purchased from GM dealer or eBay for $680/pair
OE Brake line square banjo bolts are compatible with CTS-V 6 pot caliper banjo connection w/o issue.

If you prefer not to get involve with this retrofit, you may consider this complete RB 4 pot caliper kit with 380x32mm rotors here for a 100% bolt-on installation.

Rotor Material: Racing Formula Alloyed Gray Iron & Heat treated

Surface: EDP Coating w/cross cut grinding on friction surface

This rotor kit includes:
2 ea - RB 2pc rotors
4 ea - Caliper mounting bolts (M14x2.0)
1 set - RB XT910 street performance pad (not suitable for track/race)

Dedicated track pad (Cobalt XR1)

Replacement rotor ring: D501-02

Weight Comparison

Size (mm)Wt (lbs)
OE 1pc (M3)
RB 2pc370x3423

Surface EDP Coating w/cross cut grinding on friction surface


  1. Alloyed iron formula adds strength and heat resistance. Heat treating further improves rotor performance for a more uniform and stabilized microstructure.


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

  2. 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. 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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