Holden VT VU VX VY VZ Commodore FRONT Brembo Big Brake Brackets/Adaptors - to fit Cadillac CTS-V 6 Piston front calipers


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The most affordable big brake kit for VT-VZ Commodores!


  • Under 2-Hour installation time
  • All fittings included
  •  Aircraft-grade billet brackets
  • Supply your own calipers, pads & discs


Upgrade your brakes to the MASSIVE 6-piston Front Brembo calipers and Redline spec 355mm rotors – a huge improvement from the factory Commodore brakes!

This brake upgrade kit has been specifically designed to suit Holden VT, VU, VX, VY & VZ Commodores. This brake upgrade kit has been specifically designed to suit Holden VT, VU, VX, VY & VZ Commodores. It utilises the massive 6-Piston front Brembo calipers from Cadillac CTS-V models. This means future access to affordable replacement pads and discs.

This adaptor kit allows you to fit Cadillac CTS-V 6-Piston front Brembo Calipers onto VT-VZ Commodores (inc. HSV models). Calipers are not included with this kit.

The Corvette ZL1 front 6-Piston Calipers are also compatible with these brackets.

GM Part Numbers for Calipers compatible with this kit:
Cadillac CTS-V Calipers (Silver) - 25912967 & 25912477
Cadillac CTS-V Calipers (Yellow) - 20982719 & 20982734
Cadillac CTS-V Calipers (Red) - 22885106 & 2288510
Corvette ZL1 Calipers (Black) - 20944529 & 20944530
Please note: The ZL1 Calipers are usually the most expensive out of the compatible calipers. We recommend using the Silver or Yellow Cadillac CTS-V calipers as they represent excellent value.



The kit is very straight-forward and easy to install by anyone familiar with brake systems and can be installed with basic hand tools in under 2 hours.

The adaptor brackets are manufactured from billet 6061-T6 aircraft-grade aluminium and are heat treated and anodized black to guarantee durability.

What the kit includes:


  • Set of FRONT billet 6061-T6 aircraft aluminium caliper adaptor brackets

  • 10 x FRONT rotor bushings (required to reduce the stud holes on the brake discs to accept the smaller diameter  VT-VZ wheel studs)

  • 4 x FRONT caliper bolt bushings (only required for vehicles with brake upgrades from factory)

  • All bolts and washers required for installation


Please read before purchasing:

Brake Discs Information:
Brake discs are not included in this kit.
The front discs required are the brake discs that come fitted to VE & VF Commodore Redline edition vehicles with front Brembo calipers, Size: 355mm x 32mm. (RDA Part Number: RDA8103, DBA Part Number: DBA42604)

IMPORTANT: You will need to enlarge the centre hole on the front rotors from 67.4mm to 71.4mm (if you follow the same taper/angle as the stock centre hole). If you cannot reproduce the same taper, then it is recommend to increase the hole size to 76.2mm – this will still allow the disc to still sit central on the hub because of the stainless steel stud sleeves (included with our kit).
The hole can be enlarged with a rotary tool/Dremel quite easily, however we do recommend having it done on a lathe or by a machinist.

Brake Pad Information:

Brake pads are not included in this kit.

Front brake pads required: Equivalent to Cadillac CTS-V, Jeep Grand Cherokee SRT8, and Corvette ZL1 models with front Brembo 6-Piston Calipers (RDA Part Number: RDX2398, GM Part Number: 25940447). Please see photo in listing for front brake pad measurements.

Installation Notes:

The factory steering knuckles are cast iron and may have an uneven finish from the manufacturing process. This can cause the brackets to not sit flush against the knuckle. If this is the case, you will need to sand/grind the steering knuckles to a smooth finish.

Factory brake lines can be used with this kit if your vehicle came with factory standard brakes. Note that if you have PBR Brake Upgrade Calipers (C5/C6 calipers), you will need to change your brake lines to the standard VT-VZ type as the C5/C6 lines are slightly too short.

You will need a minimum 18” wheels to clear the brake upgrade. Wheels needs to have an offset of 35mm – 42mm. Larger offsets can work but these wheels usually have concave wheel spokes that may rub on the caliper. In some instances, a small wheel spacer (2mm-5mm thick) may be required.

You will need to trim/remove the front and rear dust shields to allow the larger caliper to fit.

You will need to swap the bleeders and crossover pipe positions on the front calipers before installation. The VE-VF front calipers sit at the trailing position, while the VT-VZ Commodore calipers fit at a leading position. Swapping the crossover pipe position means the calipers will have the larger brake pistons at the correct location for best braking performance.


Brand Planet Parts
Shipping Weight 0.8000kg
Shipping Width 0.300m
Shipping Height 0.200m
Shipping Length 0.300m
Shipping Cubic 0.018000000m3

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