CTS Turbo BOSS800 Hybrid Turbo - EA839 3.0T Audi A7, A8, S4, S5, SQ5, Q7, Q8, Porsche Cayenne/Macan

The delivery time for products in stock is 1-3 business days.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders (outside of Europe) sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

CTS BOSS800 Hybrid Turbocharger for Audi / Porsche EA839 3.0T Engines

CTS introduces the new BOSS800 hybrid turbocharger for Audi and Porsche vehicles based on the EA839 3.0T engine platform . It is a direct OEM-style upgrade that significantly increases airflow while maintaining original fit, drivability and daily usability.

This hybrid supercharger is optimized for higher boost efficiency and better high-end power without compromising low-end responsiveness. The updated compressor and turbine design allows for use on a wide range of fuels – from regular gasoline to ethanol blends.

All test results presented were run on the same vehicle and the same equipment , and only the ethanol content of the fuel was changed between tests.

Performance and drivability

Power gains scale consistently with increasing ethanol content. The supercharger delivers strong mid-range torque and maintains power smoothly all the way to redline. The boost response is smooth and controlled, making this supercharger an excellent choice for both street and track configurations.

The supercharger pulls efficiently throughout the entire rev range and offers additional potential when the fuel system is upgraded accordingly.

A significant advantage is that it is a completely new turboharger unit that does not require a core and is compatible with many existing Stage 3 software .

Specifications

• 66 mm supercharger air intake (requires larger 66 mm turbo inlet pipe)

• 66 mm 7+7 billet compressor wheel

• 63 mm 9-blade, high-flow turbine wheel

• Stainless steel exhaust housing, adapted to the increased flow of the turbine wheel

• Heavy duty bearings and thrust washers

• VSR balanced

• Compatible with all exhaust systems and charge pipe solutions

• Compatible with 66 mm supercharger air intake

• Factory diverter valve and boost pressure relief valve relocation
  (06M133554A – note correct installation direction)

Bench test results – Logic Street Performance

1/4 mile time: 10.29 sec @ 140 mph

Run 1 – 92 octane gasoline

• 561 hp / ~532 lb-ft

Run 2 – E50 (92 + pump E)

• 640 hp / ~643 lb-ft

Run 3 – E55 (92 + pump E)

• 658 hp / ~654 lb-ft

Run 4 – E60 (92 + pump E)

• 671 hp / ~663 lb-ft

Note: Results were achieved on a vehicle with a full bolt-on setup and upgraded fuel system (RS6 injectors, HPFP and LPFP upgrades, 4 BAR MAP sensors) and Logic Street Performance Stage 3 programming. Actual results may vary depending on vehicle and configuration.

Parts required for installation (not included)

• 2 × 06M253039G – exhaust manifold gasket

• 1 × 059253232C – exhaust pipe ring seal

• 1 × WHT006901A – Oil supply O-ring

• 3 × WHT007689 – Oil and Coolant O-ring

• 4 × WHT004982 – sleeve nut

• 4 × N91130801 – exhaust pipe nut

• 1 × WHT007923 – connecting tube O-ring

• 2 × 8K0253115K – exhaust pipe gasket

• 1 × N0138441 – Boost pressure relief valve seal

Compatibility – EA839 3.0T engines

• Audi S4 B9/B9.5 3.0T (2018-2023)

• Audi S5 B9/B9.5 3.0T (2018-2023)

• Audi SQ5 B9/B9.5 3.0T (2018-2023)

• Audi Q7 4M 3.0T (2020–2022)

• Audi Q8 4M 3.0T (2019–2022)

• Audi A6 C8 3.0T (2019–2022)

• Audi A7 C8 3.0T (2019–2022)

• Audi AllRoad C8 3.0T (2020-2024)

• Audi A8 D5 3.0T (2019–2023)

• Porsche Macan S 3.0T (2019–2021)

• Porsche Cayenne 3.0T (2019-2023)