CTS Turbo Rear Subframe Insert Set B9 Audi A4/A5/S4/S5/RS5

The CTS Turbo Rear Subframe Insert Set addresses the factory rear subframe mounting compliance found in B9 platform Audi A4, A5, S4, S5 and RS5 models from 2017 onwards. These precision-engineered polyurethane inserts fill the voids within the OEM subframe mounts, eliminating unwanted deflection during hard cornering, acceleration and braking. By stabilising the rear subframe, this kit delivers noticeably sharper turn-in, improved steering feedback and more predictable handling characteristics. Installation integrates with existing mounting points without requiring permanent modifications, making it an ideal upgrade for performance-focused builds seeking enhanced chassis control and suspension consistency.