Vorsprung Autowerk B8/B8.5, C7, Billet Rear Differential Carrier Inserts
Vorsprung Autowerk Billet Differential Inserts: Precision Where It Matters
Eliminate unwanted drivetrain movement and enhance rear-end stability with Vorsprung Autowerk Billet Differential Inserts. Precision-machined from high-grade aluminum, these inserts fill the voids in your factory differential bushings, reducing flex and improving power transfer to the wheels. The result is sharper throttle response, improved traction, and a more connected, confidence-inspiring driving experience.
Engineered as a direct-fit upgrade for the Audi B8, B8.5, and C7 quattro platforms, these billet carrier inserts install into the factory rear differential mount with no permanent modification required.
Vehicle Fitment
These billet rear differential carrier inserts fit Audi B8/B8.5 and C7 quattro (all-wheel drive) models only — they are not for front-wheel-drive variants.
| Make | Model | Chassis | Drivetrain |
|---|---|---|---|
| Audi | S4, RS4, S5, RS5, Q5, SQ5 | B8 / B8.5 | Quattro (AWD) |
| Audi | A6, S6, RS6, A7, S7 | C7 | Quattro (AWD) |
NOTE: Fits the factory rear differential carrier on Audi quattro-equipped B8/B8.5 and C7 vehicles. Confirm your differential carrier design before ordering if you're unsure.
Billet Differential Carrier Inserts FAQ
Do these require any permanent modification to install?
No. These billet inserts install directly into the factory rear differential mount with no cutting, drilling, or permanent modification required.
Will this fit my front-wheel-drive Audi?
No. These inserts are designed for the quattro (all-wheel drive) rear differential carrier and will not fit front-wheel-drive-only models.
What will I notice after installing these?
Most customers notice sharper throttle response, reduced drivetrain slop, and a more connected feel under acceleration and deceleration, since the inserts eliminate flex in the factory differential bushings.
Do I need to remove the subframe to install these?
Installation involves accessing the factory rear differential mount. Basic hand tools and a lift or jack stands are recommended, similar to other rear subframe/differential service work.
Can I pair this with other drivetrain stiffening upgrades?
Yes — these inserts are commonly paired with our Billet Subframe Inserts for the same chassis, since both target flex in the same rear subframe/differential assembly.
Why Buy From Us?
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Enthusiast Designed & Tested: Developed by people who actually drive and modify these cars.
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Tested on Our Own Cars: Every product is validated on our own fleet before it ever reaches a customer.
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Continuous R&D: We're constantly refining our parts based on real-world feedback and testing.
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Supporting Audi Platform Development: Every purchase helps fund development of more parts for these platforms.
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Real Enthusiast Support: Talk to people who actually know these cars, not a call center script.
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Small Team, Big Passion: We're enthusiasts first, and it shows in every part we build.
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Performance Without the Marketing Fluff: Honest parts, honest descriptions, no hype.
Complete Your Build
- Billet Subframe Inserts (B8/B8.5) — stiffen the same rear subframe assembly for a fully connected rear end.
- Billet Subframe Inserts (C7 A6/S6/RS6/A7/S7) — the C7-platform companion to this differential insert kit.
Shop More Parts for Your Audi
Browse every Vorsprung part for your chassis: Audi S4 & S5 B8/B8.5 parts · Audi A6 & A7 C7/C7.5 parts · Audi Q5 & SQ5 B8/B8.5 parts.
Drive the difference. Drive Vorsprung.
Vorsprung Autowerk B8/B8.5, C7, Billet Rear Differential Carrier Inserts
Frequently Asked Questions (FAQ)
What types of products do you offer?
We offer a wide range of high-performance automotive parts including engine components, suspension upgrades, fueling solutions, and custom wheels, all designed to enhance your vehicle’s performance.
Are your products compatible with all car models?
Our products are specifically designed for high-performance vehicles, including luxury and sports cars like Audi. For compatibility details, please refer to the product description or contact our support team for assistance.
How can I ensure the correct fit for my car?
We offer guided fitment assistance for all our products. If you're unsure, feel free to reach out to our customer support team, and we'll help you find the perfect fit for your vehicle.
Where do you ship?
We currently ship to the United States and Canada, with free US shipping on orders over $425. Outside North America? Email orders@vorsprungautowerk.com with your part and address and we'll quote shipping for you.
How do I install the products?
Most of our products come with easy-to-follow installation guides. Additionally, if you need professional installation, we can recommend certified mechanics or shops for assistance.
What is your return policy?
We offer a 14-day return policy for unused products. To be eligible for a return, items must be in their original packaging and in resellable condition. Please refer to our return policy page for detailed instructions.
How can I contact customer support?
You can contact our customer support team via email at orders@vorsprungautowerk.com or through the chat button on the website.
Precision Forged Custom Wheels
At Vorsprung Autowerk, we offer the perfect blend of strength, performance, and style with our custom wheels. Crafted using the finest materials and advanced engineering techniques, our wheels are built to enhance your vehicle's handling and aesthetics.
Key Features
- Monoblock or Multipiece Design
- Custom Spoke Design
- Perfect Fitment Guaranteed
- Multiple Color & Finish Options
- Aircraft-Grade 6061 Aluminum
- Precision Forged for Durability
