Ultra Racing 4-point rear lower bar – Mercedes W221 S350 3.5 V6 2WD 05-13
Ultra Racing’s 4-point rear lower bar is a vehicle-specific solution for increasing rear chassis rigidity by linking selected lower mounting points.
Its model-specific steel construction makes it a straightforward addition alongside suspension, tyre or handling upgrades.
- 4-point Rear lower bar
- Steel Ultra Racing construction
- Vehicle-specific chassis brace
- Ultra Racing Lifetime Warranty
- Ultra Racing part number: RL4-3404
Fitment
According to the source data, fits the following models:
- MERCEDES-BENZ W221 S350 3.5 V6 2WD 2005-2013
If you are unsure whether the part fits your car, contact our customer service with your vehicle registration number and we will help confirm fitment.
Read our blog to learn more about the different types of Ultra Racing braces and the benefits of chassis stiffening.



