Ultra Racing Mini Cooper S R56 06+ UltraRacing 2x 2-Point Rear Side Bars UR-RS4-1717P
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Ultra Racing 2x 2-Point Rear Side Bars – MINI Cooper S R56
Improve rear chassis rigidity and handling consistency on your MINI Cooper S R56 with the Ultra Racing Rear Side Bar set.
Designed to reinforce structural points around the rear underside of the vehicle, this pair of 2-point braces helps reduce unwanted chassis flex during hard cornering, braking and acceleration, allowing the suspension to work from a more stable platform.
Ultra Racing part number:
UR-RS4-1717P
Pair of 2-Point Rear Side Bars
This kit uses two individual 2-point braces, positioned across the rear side areas of the chassis.
By reinforcing both sides of the rear structure, the bars are designed to help reduce unwanted movement and improve overall rear chassis rigidity.
Potential benefits include:
- Increased rear chassis rigidity
- Improved cornering stability
- More consistent suspension response
- Better rear-end feedback
- Reduced unwanted body flex
- Greater confidence during fast driving
Reduce Chassis Flex
During performance driving, the chassis is subjected to significant loads as vehicle weight transfers around the car.
Fast cornering, hard braking and acceleration can place uneven forces through different parts of the structure, allowing the chassis to flex.
Reducing this movement can help the rear suspension behave more consistently under load.
More Predictable Rear-End Behaviour
When the chassis flexes, suspension mounting points can move slightly relative to one another.
This can make the rear of the car feel less precise during harder driving.
By reinforcing both sides of the rear chassis, the Ultra Racing bars can help provide:
- More consistent rear-end response
- Improved stability through corners
- Better suspension feedback
- More predictable weight transfer
- Greater confidence during direction changes
Supports Suspension Performance
Suspension components work most effectively when their mounting points remain stable.
Reducing chassis flex can help springs, dampers, bushes and anti-roll bars work more consistently.
This makes the rear side bars a useful supporting upgrade for MINI R56 models fitted with:
- Coilovers
- Lowering springs
- Uprated anti-roll bars
- Performance bushes
- Higher-grip tyres
- Track-focused geometry
- Additional chassis bracing
Complements Other Ultra Racing Braces
Rear side bars can work especially well as part of a wider chassis reinforcement package.
Used alongside compatible front, mid and rear braces, they can help create a more consistently supported chassis throughout the car.
Road & Track Use
The Ultra Racing Rear Side Bar set is suitable for:
- Fast-road MINIs
- Trackday builds
- Performance-focused daily drivers
- Lowered vehicles
- Cars with upgraded suspension
It provides additional chassis reinforcement without changing the fundamental suspension geometry.
Vehicle Fitment
Designed for:
- MINI Cooper S R56
- 2006 onwards
Ultra Racing part number:
UR-RS4-1717P
Exact model and engine compatibility should still be confirmed before ordering, particularly where the vehicle has modified underbody, exhaust or suspension components.
If you're unsure whether UR-RS4-1717P is suitable for your MINI, please contact The Rosso Corsa Collective with your registration or exact vehicle details.
Product Image Note
Product images may be generic or illustrative.
The exact shape, mounting arrangement and supplied hardware can vary depending on vehicle application.
If you need confirmation of the exact bars or mounting points before ordering, please contact The Rosso Corsa Collective.
Professional Installation Recommended
Professional installation is recommended.
All mounting points and fasteners should be checked during installation and tightened to the appropriate specification.
Ground clearance should also be checked after installation, particularly on vehicles fitted with lowering springs or coilovers.
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