034Motorsport Billet Rear Differential Insert Kit – BMW F2x / F3x

The 034Motorsport rear differential insert kit is engineered to reduce unwanted movement in the factory rubber differential mounts on BMW F2x and F3x chassis cars. By filling the voids in the OEM bushings with precision CNC-machined aluminum, this kit improves drivetrain response during acceleration, deceleration, and shifting while keeping ride quality intact and without introducing noticeable additional NVH.

Performance Benefits

• Limits vertical movement of the rear differential under load
• Enhances throttle response and power transfer feel
• Provides more connected handling through drivetrain stability
• Minimal perceived increase in cabin noise, vibration, or harshness

Construction & Features

• Billet 6061 aluminum construction
• Precision CNC-machined for exact fitment
• Clear anodized finish for long-lasting durability
• Designed to complement factory rubber mounts
• Straightforward installation and fully reversible

OEM Part Number Exchange

• Front bushing: BMW OEM 33 31 6 792 513
• Rear bushing: BMW OEM 33 31 6 880 637

Kit Includes

• 2 x front differential insert
• 1 x rear differential insert
• 1 x washer

Installation

Installation is designed to be simple with basic tools. The insert kit works in conjunction with the factory mounts and can be removed to return the vehicle to stock configuration if desired.

034Motorsport part number: 034-505-2026