Upgrade the performance and reliability of your BMW S55-powered platform with the Arashi KBT S55 Twin Turbo Ball Bearing Upgrade. Designed as a high-flow replacement for the factory turbochargers, this twin turbo set is engineered for stronger response, increased airflow, and enhanced durability for both street and performance builds.
Manufactured by Arashi Performance, a professional Japanese racing parts manufacturer, these turbos feature brand-new CHRAs balanced using a Turbo Technics VSR core-balancing machine. With billet compressor wheels, high-performance Inconel turbine wheels, and dual-row ceramic ball bearings, this setup offers improved spool characteristics and long-term reliability over OEM units.
🚗 Compatibility:
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⭐ Features & Technical Specifications:
- Application: BMW S55 3.0L Twin-Turbo Engine
- OEM Replacement Part Numbers: 11657850278, 11657849650, 11657850279, 11657849651
- Additional Interchange Numbers: 7850278, 7850279
- Compressor Wheel: 47 / 58 mm billet, 6+6 blade design
- Turbine Wheel: 45.6 / 50 mm high-flow, 9-blade TD04HL Inconel
- Turbine Housing: 6 cm²
- Bearing System: Dual-row ceramic ball bearings for reduced friction and faster response
- Balanced CHRA: VSR balanced by Turbo Technics (balance sheet included)
📦 Package Includes:
- Arashi KBT S55 Twin Turbochargers × 1 set
- Turbo compressor intake pipe (Front)
- Turbo compressor intake pipe (Rear)
- VSR balance sheet
Important Notes
- Professional tuning and supporting modifications are required to safely operate upgraded turbochargers.
- Recommended supporting mods include upgraded fueling, cooling, intake, exhaust, and ECU tuning.
- Performance results vary based on tune, fuel type, and overall build configuration.
- This item may be a pre-order if stock is not currently held — please contact us for availability.
- Ships directly from manufacturer.
ShipInsure Package Protection
We recommend selecting ShipInsure during checkout to protect your order from loss, theft, or damage during transit. Orders without protection are not eligible for shipping-related claims.
File a claim: Claims Center
EuroSpeed offers free worldwide shipping on all products.
We include tracking information at no extra charge with every order. Most in-stock items are processed and ready to ship within 2–5 business days.
Free Shipping Policy
At EuroSpeed, shipping is included in the price of our products for your convenience. This policy covers the initial cost of shipping your order to your destination.
Note: Import duties, taxes, or clearance fees imposed by your country are not covered under this policy and are the recipient’s responsibility. While our shipping partners typically handle customs clearance, they may occasionally require additional information. If needed, our team is here to assist with the process.
Fulfillment Locations
We stock products at both our U.S. facility and international fulfillment centers to accommodate buyers worldwide. Your order will ship from the location where the product is currently available.
If you would like to confirm stock availability at a specific location, please contact us prior to purchase.
Shipping Times (Estimated)
- Orders typically ship within 5 business days of purchase
- Custom carbon fiber items may require additional time for production
- Delivery to most countries usually takes 5–14 business days after shipping
- Custom carbon fiber items may deliver in 2–8 weeks from purchase date
- All orders will receive a tracking number once generated by the courier (may take 2–3 business days after dispatch).
If any delays arise, we will promptly notify you via email with an updated timeline. Please note that these are estimates and may vary due to unforeseen circumstances. We cannot cancel or refund an order while it is in transit due to delays until the carrier officially marks it as lost.
Receiving Your Item
Upon delivery, carefully inspect the item for any defects or damage before signing for it. If the item is damaged or not as expected, do not accept the package. Once a damaged or defective product is accepted, EuroSpeed cannot cover return shipping costs.
Please ensure your shipping address is entered correctly. We are not responsible for any costs associated with providing an invalid or incorrect address, failure to accept delivery at the provided address, or failure to collect delivery from the post office within the required time frame. We are unable to provide refunds for orders delivered to an incorrect address.
Import Information
EuroSpeed’s free shipping policy does not include import fees, taxes, or duties required by your destination country. These charges are the responsibility of the recipient, and we are not responsible for any duties or taxes that your local customs may request. Please contact your local customs office or refer to their website for information on duty and tax amounts.
Most shipments clear customs automatically through the shipping provider. However, if additional information is needed to complete the process, we will assist you to ensure a smooth resolution.
If customs clearance fails and the item is returned or destroyed:
- EuroSpeed reserves the right to deny refund claims
- Returned items may incur return shipping fees, which will be deducted from any eligible refund
- Items deemed too costly to return will be destroyed, and no refund will be issued if this occurs
ShipInsure Package Protection
For added peace of mind, EuroSpeed offers ShipInsure—an optional package protection service for your order. When selected during checkout, this service ensures coverage for lost or damaged packages. We are not responsible for shipping delays, lost packages, or damaged items if purchase protection is not selected during checkout.
- Protects against lost or damaged packages
- Must be selected at checkout
- Not all oversized body kit purchases are eligible—please contact us for custom insurance arrangements if needed
To file a claim: Please visit our Claims Center.
ShipInsure Coverage Policy
- Claim must be filed within 14 days of delivery
- Packages stuck in transit for 14 days are considered lost
- Damaged claims typically require photo evidence
- 2-day buffer after delivery before lost/stolen claims may proceed
- Police reports may be required for orders over $500 or where fraud is suspected
- “Damaged” means broken and unusable
📨 Questions?
For any inquiries about your order or our shipping policies, please contact our team at support@eurospeed.co. We’re here to help!
Product Installation & Use Disclaimer
EuroSpeed is not liable for any damages, injuries, or issues resulting from the installation or use of our products.
We strongly recommend professional installation to ensure proper fitment and function. Any damage caused by improper installation, misuse, or modification is the sole responsibility of the user.
By purchasing and using this product, you acknowledge and accept all associated risks.