VTT G8X Lightweight Rear Brake Kit

G80 M3 / G82 M4 / G83 / G81

Don’t be fooled by non-vented 4-piston rear “drag-only” kits for the G8X. Those systems are built for single-pass use — not repeated street driving or real-world braking.

The VTT G8X Lightweight Rear Brake Kit drops over 30 lbs of unsprung weight off the rear of your G8X while running 13” vented rotors and your choice of 4-piston or 6-piston calipers.

Real weight reduction.
Vented rotors.
Street-capable braking.
Drag-ready performance.

This system allows you to run the wheel/tire combination needed to lower ETs — while putting the factory rear setup on a serious diet.

⚠ This kit removes the factory electronic parking brake.
Parking brake functionality will be lost.

True Plug-and-Play Design

Complete bolt-on system using genuine VTT components:

• VTT Custom 13” HD Vented Rotors

• Genuine VTT 4-Piston or 6-Piston Calipers

• Genuine VTT Street or Race Brake Pads

• DOT-Approved Brake Lines

• VTT CNC 7075 Rotor Hats

• VTT CNC Brackets

Pad compatibility:

• 6-Piston Dynapro Pad Style 6712
  (Multiple aggressive compounds available.)

Fitment

• G8X Platform – All Models Supported

Configuration Options

HD 6-Piston Version

Designed for:

• Street driving

• Track duties

• Drag racing

HD 4-Piston Version

Designed for:

• Street use

• Drag racing

Weight Savings Breakdown

REAR (Per Side)

Factory:

• Rotor: 18 lbs

• Caliper: 15.1 lbs

• Total: 33.1 lbs

VTT 6-Piston:

• Rotor + Hat: 12.4 lbs

• Caliper: 5.3 lbs

• Total: 17.7 lbs

✔ 15.4 lbs savings per side

VTT 4-Piston:

• Rotor + Hat: 12.4 lbs

• Caliper + Bracket: 4.0 lbs

• Total: 16.4 lbs

✔ 16.7 lbs savings per side

Total Rear Savings

✔ 30.8 – 32.1 lbs total unsprung weight reduction
✔ 11.2 – 12.5 lbs rotating weight reduction

Important Disclaimer

• Parking brake function is deleted with this kit.

• VTT HD kits are designed for street use and drag racing.

• Always operate within your limits.

Bedding Procedure – CRITICAL

Brake pads must be properly bedded to achieve full braking performance.

Failure to properly bed pads may result in:

• 30–50% braking effectiveness

• Pad glazing

If glazing occurs:

• Remove rotors

• Sand pads

• Re-bed properly

Follow the included bedding procedure card exactly.

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.