SKU: 58834368071

034 X-Brace Billet Aluminum Chassis Reinforcement | B8 | B8.5 Audi A4 | S4 | A5 | S5 | RS5 | Q5 | SQ5

Sale price$487.30 Regular price$541.44
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

034 X-Brace Billet Aluminum Chassis Reinforcement | B8 | B8.5 Audi A4 | S4 | A5 | S5 | RS5 | Q5 | SQ5034Motorsport 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

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.

Features:
  • 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!
What's Included:
  • 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)
Installation Instructions:
Fitment:
  • 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
Replaces:
  • 8T1 399 345J / 8T1399345J
  • 8K1 399 345E / 8K1399345E
Please Note:
  • 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. Complete factory bolt kits are sold separately above.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 58834368071

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tbonemack
Lake Worth, US
★★★★★ 5
Great bar carts!!
Size: Rustic Brown, Style: Standard, Size: Rustic Brown, Style: Standard
They are excellent quality. Very easy to put together. They look great!!
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Reviewed in the United States on May 27, 2026
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Dag
Lowell, US
★★★★★ 5
Great product at a great price!
Size: Rustic Brown, Style: Standard
I don't leave a lot of reviews but was pleasantly surprised by the look and build quality. Would 100% recommend! Great price too
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Reviewed in the United States on March 13, 2026
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Rina Dadon
Grantham, US
★★★★★ 5
Bar Cart Review
Size: Rustic Brown, Style: Standard
Easy and quick to assemble/put together. Happy with the look and how much it is able to hold. Yet it’s still small enough to fit in a corner of my apartment.
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Reviewed in the United States on October 28, 2025
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Carolyn
Boise, US
★★★★★ 5
Chic, sturdy, and perfect for entertaining
Color: Gold, Color: Gold
This bar cart is exactly what I was hoping for. The gold finish gives it a really elevated, high-end look without the high-end price tag. It fits perfectly into my space and instantly makes the area feel more put together. Assembly was straightforward, and once built, it feels sturdy and well-balanced. The wheels roll smoothly, which makes it easy to move around when hosting or rearranging. I also appreciate the three-tier design, it holds a good amount without feeling bulky. I’ve styled it as a bar cart, but it would honestly work just as well as a coffee station or decorative piece. It’s one of those items that’s both functional and aesthetic. Definitely a great buy if you want something stylish that still feels practical.
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Reviewed in the United States on April 21, 2026
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Amazon Customer
New York, US
★★★★★ 5
Beautiful Bar Cart
Color: Gold, Color: Gold
Beautiful and very sturdy. It took about 1 hour to put together. The directions was a little confusing when it came to the middle bar that connects C & D. Make sure the middle bar is down facing so the marble slab will lay flat. Other than that, beautiful piece , great quality and perfect size.
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Reviewed in the United States on May 27, 2026

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