BorgWarner K04 Turbocharger Upgrade Left - Audi RS4 B5 2.7L Biturbo

BorgWarner K04 left-side turbocharger upgrade for the Audi RS4 B5 2.7L biturbo. A direct-fit upgrade over the factory turbo that flows more air for added power and response while retaining OEM-style fitment. Sold individually for the left (driver-side) position.

Specifications

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy