4.0 TFSI Ball Bearing Turbo Upgrade

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  • Regular price $5,995.00

Ball bearing 4.0TFSI turbo upgrade compatible with all 4.0T Audi engines (S6/S7/RS6/RS7/S8).

We use a GT28/GT30 OR Xona rotor ball bearing cartridge to increase output by over 25% without sacrificing spool.  Core can be any model 4.0T turbocharger.  Sets are in-stock and ready to ship! Includes OEM 5axis CNC'd oil and water adapters to preserve stock lines. 

This turbo upgrade requires a core exchange. Once you've placed your order we will contact you to arrange return shipping for your old turbos!


All SRM products are special order with limited availability. Once your order is placed it will begin processing. If your part is in stock, we will contact you immediately and ship within 1 week. If the part is out of stock, we will contact you when it's been completed and shipping is available. By adding this product to your cart you acknowledge that you are OK with this guideline.