Audi S4 Rear Differential Mount Insert - Torque Solution - Billet - `05-`09 is a billet replacement insert for the rear differential mount. It replaces the factory rubber isolator to give a firmer, more positive mounting point for the rear differential on 2005–2009 S4 (B7) applications.

Made as a direct-fit component, this Torque Solution billet insert is machined to match the original mount geometry while removing excess compliance found in the stock rubber piece. The result is a cleaner transfer of torque through the rear differential and a more consistent feel under acceleration and during spirited driving. The part is designed for enthusiasts who want a durable, serviceable solution without major modifications.

Features

• Billet construction for strength and repeatable fit
• Direct-fit replacement for `05–`09 Audi S4 (B7) rear mount
• Reduces differential movement compared to stock rubber isolator
• Easy to install with basic hand tools; retains factory mounting points

If you have questions or need help confirming fitment, call us directly — 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services. If you’re considering purchasing multiple items, please contact us for shipping discounts. We install on premises at both locations and can help with fitment or installation scheduling.

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