Emmanuele Design eMMOTION Audi A4 Quattro B9 (2017+) Rear Sway Bar Upgrade

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  • Regular price $285.00 USD


For those looking for the next step in improved handling, we are pleased to release our rear sway bar upgrade for the Audi A4 Quattro (B9). As the world’s first upgraded sway bar for the B9 platform, our sway bar has gone through months of development and testing on our in-house A4 Quattro. Intended to be paired with our lowering spring kit, the rear sway bar upgrade will dramatically reduce body roll to create a more neutral steering balance. This sway bar upgrade is specifically designed to function with the OEM front sway bar, getting rid of the factory under-steer while allowing enough compliance for a comfortable ride and predictable suspension behavior.

OEM 19mm Sway Bar Rate: 100 lb./in.

eMMOTION Sway Bar Rate: 295 lb./in.

What’s In The Box?

Sway Bar – The sway bar is a 22.2mm solid bar that is manufactured in the USA from high quality spring steel. We opted for a solid design, as it ensures that our sway bar will last a lifetime of abuse without risk of breakage or deformation. In order to maintain the factory suspension geometry (for those using stock end links), we opted for a non-adjustable design.

Billet Brackets – Included with each sway bar is a set of our custom billet brackets. Through CAD design and stress analysis, we developed a stronger alternative to typical stamped brackets. Each bracket is CNC machined, anodized black and finished with a stealth “e”.

Steel Subplates – The factory sway bar bushings sit inside a void on the rear subframe. In order to properly utilize our provided bushings, we include a steel subplate which serves as a base for our bushings. By using our included subplate, the subframe can properly accept our included D-shaped bushing.

Upgraded Bushings – The included bushings are designed to minimize noise typically associated with polyurethane bushings. Using a unique interior groove, the bushing is able to better hold and maintain lubricating grease. This ensures continued usage without developing squeaks and creaks.

Sway Bar Sizing Explained

Sway bars are typically referenced by a measurement (in inches or mm) that refers to their outer diameter. A solid bar (meaning there is no interior void) will be much stiffer than a hollow bar of the same outer diameter. In order to make comparisons between a solid bar and a hollow bar, you must know the wall thickness of the hollow bar. So when comparing two sizes, say a 22mm solid bar and a 24mm hollow bar, it is inaccurate to conclude that the 24mm bar will be stiffer without first knowing how thick the wall is.


Weight 3 lbs




Make Model Year Generation
AUDI A4 2017 - 2021 B9