The 034 Motorsport Billet Aluminum Rear Subframe-insert set for the BMW F2x/F3x chassis Designed to minimize movement in the factory rear subframe mounts, this helps maintain proper suspension geometry during cornering and improves the responsiveness of the rear suspension and differential. By filling small gaps in the four factory mounts and minimizing vertical movement, this insert kit eliminates unwanted play and delivers a refined, connected driving experience, especially during performance driving. These precision-machined billet aluminum components reduce deformation of the rubber subframe bushings under load, resulting in a more stable rear subframe feel. This contributes to better suspension geometry, reduces understeer, and increases the effectiveness of upgrades like a rear sway bar. Despite the performance gains, there is no noticeable increase in noise, vibration, or harshness in the cabin. Designed to work with the factory rubber mounts, the insert kit has been extensively tested by both 034 Motorsport and independent BMW enthusiasts on a variety of F2x/F3x vehicles. Installation is simple and can be completed in under an hour, with no permanent modifications required. This makes the kit fully reversible, should that be desired.
Advantages:
• 6061 billet aluminum construction
• CNC machined for precision
• Anodized layer for durability
• Fills the gaps in the factory mounts
• Helps maintain suspension geometry during cornering
• Reduces subframe movement under acceleration and launches
• Improves shifting for sharper and more precise transitions
• No increase in NVH (noise, vibration, harshness) in the cabin
• Easy installation in under an hour, fully reversible
Contents:
• 2x Upper front inserts
• 2x Upper rear inserts
• 2x Lower front inserts
• 2x Lower rear inserts
Installation Instructions
