Ultra Racing Audi A3 Mk2 (8P) / Audi TT 8J Rear Anti Roll Bar URAR23-138
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Ultra Racing 23mm Rear Anti-Roll Bar – Audi A3 8P / Audi TT 8J – UR-AR23-138
The Ultra Racing UR-AR23-138 is a 23mm solid rear anti-roll bar designed for selected Audi and Volkswagen Group platforms, including the Audi A3 8P and Audi TT Mk2 8J. By increasing rear roll resistance, it helps reduce excessive body movement through corners and gives the chassis a more controlled, responsive feel during quicker direction changes.
On the Audi TT 8J in particular, this upgrade can be useful for drivers looking to sharpen the handling balance of front-wheel-drive models without relying solely on firmer springs or dampers. The thicker rear bar works across the rear suspension to resist roll, helping the car stay flatter and feel more composed under lateral load.
Ultra Racing specifies this bar as a 23mm solid design with bolt-on installation. Manufacturer fitment data lists the Audi TT Mk2 8J 2.0 TFSI 2WD from 2006–2014, while UK specialist listings also show UR-AR23-138 for front-wheel-drive TT Mk2 applications including 1.8 TFSI and 2.0 TFSI models.
Key Features
• 23mm solid rear anti-roll bar
• Helps reduce body roll through corners
• Increases rear roll stiffness
• Can improve chassis balance and response
• Particularly suited to fast-road and performance-focused setups
• Vehicle-specific bolt-on design
• Approximate dimensions: 107 × 24 × 11 cm
• Approximate weight: 4.5 kg
• Part number: UR-AR23-138 / URAR23-138
Vehicle Fitment
Audi A3 Mk2 / 8P
2.0 FSI 2WD
2003–2013
Audi TT Mk2 / 8J
2.0 TFSI 2WD
2006–2014
UK specialist application data also lists this bar for additional front-wheel-drive TT 8J variants, including 1.8 TFSI.
Product Details
Brand: Ultra Racing
Product Type: Rear Anti-Roll Bar
Position: Rear
Diameter: 23mm
Construction: Solid
Installation: Bolt-on
Part Number: UR-AR23-138
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