Alcon Rear Big Brake Kit
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Alcon Rear Big Brake Kit - BMW 3 Series / 4 Series / 5 Series / 6 Series (G20 / G22 / G30 / G32)
This Alcon rear big brake kit is built for the BMW 3 Series (G20), 4 Series (G22), 5 Series (G30) and 6 Series Gran Turismo (G32). It pairs an Alcon 4-piston caliper with a 2-piece rotor on a vehicle-specific billet hat and bracket, giving the rear axle more thermal capacity and less unsprung weight, and it helps keep the brake balance right once the front brakes have been upgraded. It suits fast road cars, track days and motorsport.
Choose your caliper
- CAR36 "Motorsport": 4-piston caliper with a bolted 2-piece body, for track use. 343x28mm or 355x28mm rotors.
- CAR49 "Motorsport": 4-piston CAR49 caliper for track and competition use. 343x28mm or 355x28mm rotors.
Then pick your rotor size and brand. Alcon and Paragon rotors are offered on every size.
Replacement rotor rings: when the rotor rings wear out, use our Rotor Ring Finder to find the right replacement.
Brake fluid: bleed the new system with Alcon PRO-600 for road and track days, or PRO-660 for racing.
Note: The included pads are basic street pads for road use only, so fit a track compound before track days. This is a rear kit, usually fitted alongside a front big brake kit. Kits are made to order. Installation by a professional is recommended.
Kit Contents
- 2 x Alcon 4-piston calipers
- 2 x Alcon or Paragon 2-piece rotors (your choice)
- 1 x axle set of basic street brake pads (road use only)
- 2 x vehicle-specific billet hats and brackets
- 1 x HEL or Goodridge braided brake line kit
- 1 x high-tensile mounting hardware kit
- 1 x installation guide
Need help choosing the right setup? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Year | Notes |
|---|---|---|---|---|
| BMW | 3 Series | G20 / G21 | 2019 - Present | Rear Fitment - EPB Delete Required |
| BMW | 4 Series | G22 / G23 / G26 | 2020 - Present | Rear Fitment - EPB Delete Required |
| BMW | 5 Series | G30 / G31 | 2017 - 2023 | Rear Fitment - EPB Delete Required |
| BMW | 6 Series GT | G32 | 2017 - 2023 | Rear Fitment - EPB Delete Required |
Contents
What's In The Box?
- 2x Alcon Performance Calipers
- 2x Alcon or Paragon Rotors (Custom selection)
- 2x Custom Billet Hats and Brackets (Vehicle Specific)
- 1x HEL or Goodridge Braided Brake Line Kit
- 1x High-Tensile Mounting Hardware Kit
- 1x Detailed Installation Guide
No instructions available for this product.
Alcon Caliper Comparison Guide
Dive into the technical specifications. Compare piston sizing, rotor compatibility, and architectural data across Alcon's purpose-built street, dual-use, and dedicated motorsport calipers.
| Overview |
![]() CAR97 "MONO6" Full Specs |
![]() CAR70 "RC6" Full Specs |
![]() CAR99 Full Specs |
![]() CAR89 "TA6+" Full Specs |
![]() CAR89 Motorsport Full Specs |
![]() CAR89 "Billet" Full Specs |
![]() CR6420 Full Specs |
|---|---|---|---|---|---|---|---|
| Category | Performance Street | Performance Street | Premium Street | Street / Track | Dedicated Track | GT / Touring Car | GT / Touring Car |
| Construction | Monobloc Cast | 2-Piece Forged | Monobloc Billet | Forged Aero | Billet Aero | Monobloc (1-Piece) | Billet Aero |
| Piston Sizing | 30.2 / 34.9 / 38.1mm | 27.1 / 31.8 / 38.1mm | 27.1 / 31.8 / 38.1mm | 27.1 / 31.8 / 38.1mm | 30.2 / 34.9 / 38.1mm | 27.1 / 31.8 / 38.1mm | 27.0 / 31.8 / 38.1mm |
| Overview |
![]() CAR69 "RC4" Full Specs |
![]() CAR23 Full Specs |
![]() CRB343 Full Specs |
![]() CRB332 Full Specs |
|---|---|---|---|---|
| Category | Performance Street | Dedicated Track | Dedicated Track | Dedicated Track |
| Construction | 2-Piece Forged | Billet Monobloc | Radial Mount | Radial Mount |
| Piston Sizing | 38.1 / 41.3mm | 38.1 / 41.3mm | 38.1 / 41.3mm | 38.1 / 41.3mm |
| Overview |
![]() CAR98 "MONO4" Full Specs |
![]() CAR69 "RC4" Full Specs |
![]() CAR49 "TA4+" Full Specs |
|---|---|---|---|
| Category | Performance Street | Performance Street | Street / Track |
| Construction | Monobloc Cast | 2-Piece Forged | Forged Aero |
| Piston Sizing | 31.8 / 31.8mm | 31.8 / 31.8mm | 31.8 / 31.8mm |
| Overview |
![]() CRR300 Full Specs |
![]() CRR280 Full Specs |
|---|---|---|
| Category | Dedicated Track | Dedicated Track |
| Construction | Radial Monobloc | Radial Mount |
| Piston Sizing | 28.6 or 34.9mm | 2-Piston |
Caliper Name

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