COMPATIBLE: (3.0L - B58B30)

2021 - 2026 BMW 230i G42

2021 - 2026 BMW M240i G42

2021 - 2026 BMW M240i xDrive G42

2019 - 2026 BMW 330i G20/G21

2019 - 2026 BMW 330i xDrive G20/G21

2019 - 2026 BMW M340i G20

2019 - 2026 BMW M340i xDrive G20

2021 - 2026 BMW 430i G22/G23/G26

2021 - 2026 BMW 430i xDrive G22/G23

2021 - 2026 BMW M440i G22

2021 - 2026 BMW M440i xDrive G22

2019 - 2026 BMW Z4 sDrive40i G29

2019 - 2026 BMW Z4 M40i G29

2019 - 2026 TOYOTA GR SUPRA

The Black Market Race Rear Differential Solid Mount Kit

 is a supplemental brace that connects the rear differential cover directly to the subframe, significantly reducing flex and stabilizing the drivetrain under load. This added reinforcement improves traction, throttle response, and reduces wheel hop—without replacing the factory mounts.

Unlike other kits that rely on rivet nuts, ours uses a tapped steel back plate inserted into the subframe for a secure mount and significantly better load distribution.

At the end of the day we are confident that this is the most rigid and easy to install rear differential bracing solution on the market for the platform.

One new hole must be drilled into the subframe—a precision drill bit is included with the kit for convenience. All mounting hardware is stainless steel for long-term strength and corrosion resistance.

• Adds a solid rear mount to reduce differential movement under load

• Improves traction, throttle response, and drivetrain stability

• Tapped steel back plate—no rivet nuts or weak hardware

• Includes all stainless steel hardware and drill bit needed for install.

• Requires drilling one hole in the subframe

• Bolt-on installation with no removal of factory mounts

 FITMENT

• G42 – 2 Series (2022+)
  

• BMW M240i xDrive

• BMW 230i

• G20 – 3 Series Sedan (2019+)
  

• BMW 330i / 330i xDrive

• BMW M340i / M340i xDrive

• G20N – 3 Series Sedan LCI (2023+)
  

• BMW 330i / 330i xDrive (Facelift)

• BMW M340i / M340i xDrive (Facelift)

• G21 – 3 Series Touring (2019+)
  

• BMW 330i Touring / M340i Touring (Europe and select markets)

• G21N – 3 Series Touring LCI (2023+)
  

• BMW 330i / M340i Touring (Facelift)

• G28 – 3 Series Long Wheelbase (China only)
  

• BMW 325Li / 330Li / M340Li

• G28N – 3 Series LCI Long Wheelbase (China only)
  

• BMW 330Li / M340Li (Facelift)

• G22 – 4 Series Coupe (2021+)
  

• BMW 430i / 430i xDrive

• BMW M440i / M440i xDrive

• G22N – 4 Series Coupe LCI (2024+)
  

• BMW 430i / M440i (Facelift)

• G23 – 4 Series Convertible (2021+)
  

• BMW 430i Convertible

• BMW M440i Convertible

• G23N – 4 Series Convertible LCI (2024+)
  

• BMW 430i / M440i Convertible (Facelift)

• G26 – 4 Series Gran Coupe (2022+)
  

• BMW 430i Gran Coupe

• BMW M440i Gran Coupe

• G29 – Z4 Roadster (2019+)

• BMW Z4 sDrive30i

• BMW Z4 M40i

• A90 / A91 Supra

WARRANTY: