034Motorsport's B8 Audi A4/S4/RS4, A5/S5/RS5, Q5/SQ5, Allroad X-Brace Chassis Reinforcement Upgrade is designed to replace the factory front subframe brace to increase torsional rigidity, resulting in improved steering feel and handling performance. Machined in-house from T6-6061 billet aluminum, the 034Motorsport X-Brace is engineered to outperform the stock welded, stamped steel part and ensure that suspension geometry is not compromised by chassis flex under hard cornering.
The beautifully-crafted X-Brace is a direct, bolt-in upgrade for both B8 and B8.5 chassis vehicles, and offers more direct and consistent steering feel, and better handling, without sacrificing comfort.
034Motorsport is proud to offer our Billet Aluminum X-Brace Chassis Reinforcement Upgrade for the B8 & B8.5 Audi A4/S4/RS4, A5/S5/RS5, Q5/SQ5, and Allroad! The factory Audi front subframe brace is manufactured from multiple pieces of stamped steel, and allows for performance-hindering chassis flex under load. This torsional flex can result in improper suspension geometry and alignment when cornering, and leads to vague steering feel and lack of steering precision.
The 034Motorsport X-Brace is a billet aluminum chassis reinforcement to replace the factory front subframe brace to increase torsional rigidity, resulting in improved steering feel and handling performance. Machined in-house from T6-6061 billet aluminum, the 034Motorsport X-Brace is engineered to outperform the stock welded, stamped steel part and ensure that suspension geometry is not compromised by chassis flex under hard cornering. Weighing in at 8.2 pounds versus 7.8 pounds for the factory stamped steel part, the X-Brace adds significant strength and rigidity with a negligible effect on weight.
This chassis brace upgrade was thoroughly tested by 034Motorsport and independent Audi enthusiasts before release. Installation is very simple, can be performed in minutes, and is completely reversible.
- T6-6061 Billet Aluminum Construction
- CNC-Machined In-House
- Clear Anodized Finish for Durability
- Engineered to Replace Factory Front Subframe Brace
- Drastically Reduces Chassis Flex When Cornering
- Enhances Handling Dynamics and Performance
- Improves Steering Feel, Consistency, and Precision
- Will Not Cause Additional NVH Transfer Inside Cabin
- Modular Design Fits Both B8 (Pre-Facelift) & B8.5 (Facelift) Models
- Easy, Straightforward Installation!
- 034Motorsport Billet Aluminum X-Brace Chassis Reinforcement (Fits B8/B8.5 Audi A4/S4/RS4, A5/S5/RS5, Q5/SQ5)
- Modular X-Brace Inserts (Set of 2)
- M10 X-Brace Assembly Screws (Set of 4)
- M5 Undercarriage Tray Mounting Screws (Set of 4)
- 15mm Undercarriage Tray Mounting Washers (Set of 4)
- Web - PDF
- Product Information Sheet
- 2009 - 2016 Audi A4 (B8/B8.5)
- All LHD Models
- 2010 - 2016 Audi Allroad (B8/B8.5)
- All LHD Models
- 2010 - 2017 Audi S4 (B8/B8.5)
- All LHD Models
- 2013 - 2017 Audi RS4 (B8/B8.5)
- All LHD Models
- 2008 - 2017 Audi A5 (B8/B8.5)
- All LHD Models Except Cabriolet
- 2008 - 2017 Audi S5 (B8/B8.5)
- All LHD Models Except Cabriolet
- 2013 - 2017 Audi RS5 (B8/B8.5)
- All LHD Models Except Cabriolet
- 2008 - 2017 Audi Q5/SQ5 (B8/B8.5)
- All LHD Models
- 8T1 399 345J / 8T1399345J
- 8K1 399 345E / 8K1399345E
- Fits LHD (Left-Hand-Drive) Vehicles Only. Does Not Fit RHD (Right-Hand-Drive) Vehicles.
- Does Not Fit Cabriolet.
- The X-Brace will fit the Audi RS5, however, due to a variation in the belly pan, it will block some mounting points for the plastic shield.
- We recommend using new factory stretch bolts to install the X-Brace.
