K04 Twin Turbocharger (RS4, S4, A6 2.7L)
RS4 K04 Twin Turbo Upgrade for 99-04 Audi A6 C5 2.7L V6, 00-02 Audi S4 B5 (00-02 2.7L V6)
Compatibility:
- 1999 2000 2001 2002 2003 2004 Audi A6 C5 2.7L V6
- 2000 2001 2002 Audi S4 B5 2.7L V6
Note: Upgrade will require the use of an upgraded inlet hose which is not included. You can purchase an inlet hose from the dealership. Factory oil lines need to be replaced with new oil lines during installation.
Stock replacement for: Audi RS4 00-01 2.7L
Part Numbers:
- Audi Part Numbers: 078 145 706 HP; 078 145 706 HP; 078 145 705 HP; 078 145 705 HP
1 Year Warranty (must be installed by a professional mechanic to be valid)
Additional Information
| Special Notes |
Off-Road And Competition Use Only Due To Federal Emission Regulations. |
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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We reward enthusiasts who trust us with their major projects. Use these tiered codes at checkout to apply instant savings to your order:
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• AH630 — $630 OFF $9000+
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Fitment Guarantee:
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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Leveraging our massive supply chain, we secure hard-to-find components that other shops can't access. Whether it's a standard upgrade or a custom exotic application, we have the network to get it to your door.
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Building something big? If you’re planning a full overhaul or need a custom quote, reach out to our team via our
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Direct Consultation:
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For sales inquiries, help applying Project Incentives, or immediate assistance with a new order:
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To qualify for our Fitment Guarantee, please email your vehicle’s Year, Make, Model, and any existing modifications to:
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Our experts will review your specifications and provide written confirmation for your build.
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We proudly support builds across the US, Canada, Mexico, and worldwide. For international shipping quotes or oversized freight logistics, please contact us via the email link above.
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We offer FREE Ground Shipping within the 48 contiguous United States. Most in-stock orders process within 48 hours. For your security, high-value performance parts require a signature upon delivery to ensure they reach you safely.
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Please inspect your order immediately. Damage must be reported within 48 hours. For freight/LTL items, if you cannot inspect the contents immediately, please write "Subject to Inspection" on the delivery receipt before signing.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Need assistance? Reach out via our
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Fitment Guarantee
Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
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Verify Your Build:
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If this product doesn't list your specific vehicle data, simply reach out to support@autohousesupply.com. We will manually verify compatibility for you.
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Our Promise:
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When we confirm a fitment in writing and it doesn’t work for your application, we cover the return shipping and exchange it at no cost to you.
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Questions? Send us your
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