CTS Turbo BOSS800 Hybrid Turbocharger Upgrade for B9 Audi S4, Audi S5, Audi SQ5 and more
- Description
- Fitment
- Refund Policy
Description
We are excited to announce our new BOSS800 hybrid turbo for the Audi/Porsche EA839 3.0T platform. This is a direct replacement upgrade that significantly increases airflow while retaining OEM-style fitment and drivability. This hybrid unit is optimized for higher boost efficiency and improved top-end power without sacrificing low-RPM response. The turbo utilizes an upgraded compressor and turbine configuration, allowing it to support a wide range of fuel blends from pump gas to ethanol mixes. All testing shown was performed on the same vehicle and hardware, with only fuel content changed between runs.
Power gains scale predictably with ethanol content, showing strong midrange torque and sustained power through the upper RPM range. Boost response remains smooth and controlled, making the turbo suitable for both street and track-focused builds. This turbo pulls all the way to redline and has more potential with additional fueling.
The best part is that this is a full brand-new unit that does not require a core and it is compatible with many off-the-shelf stage 3 tuning.
Turbocharger specs:
- 66mm turbo inlet, larger turbo inlet is required
- 66mm 7+7 design billet compressor wheel
- 63mm 9 blade high-flow turbine wheel
- Stainless steel exhaust housing, matched to increased flow of the turbine wheel
- Heavy duty bearings and thrust washers
- VSR balanced
- Compatible with any exhaust, any charge pipe, and 66mm turbo inlet
- Transfer of factory diverter valve and boost pressure relief valve (06M133554A, pay attention on how it is installed).
Dyno Results from our friends at Logic Street Performance (1/4 mile time: 10.29 at 140mph)
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Run 1 – 92 Octane:
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 that these results were achieved in a vehicle with full bolt-ons and upgraded fueling system (RS6 injectors, HPFP and LPFP upgrade, 4BAR Map sensors) and Logic Street Performance stage 3 tuning. Your result may vary.
Parts required for installation (not included):
- 2x 06M253039G – exhaust manifold gasket
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1x 059253232C – exhaust ring gasket
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1x WHT006901A – oil feed o-ring
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3x WHT007689 – oil feed and coolant o-ring
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4x WHT004982 – barrel nut
- 4x N91130801 – exhaust nut
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1x WHT007923 – connecting pipe o-ring
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2x 8K0253115K – exhaust gasket
- 1x N0138441 – seal for boost pressure relief (jet) valve
- 2018 – 2023 B9/B9.5 Audi S4 3.0T
- 2018 – 2023 B9/B9.5 Audi S5 3.0T
- 2018 – 2023 B9/B9.5 Audi SQ5 3.0T
- 2020 – 2022 4M Audi Q7 3.0T
- 2019 – 2022 4M Audi Q8 3.0T
- 2019 – 2022 C8 Audi A6 3.0T
- 2019 – 2022 C8 Audi A7 3.0T
- 2020 – 2024 C8 Audi AllRoad 3.0T
- 2019 – 2023 D5 Audi A8 3.0T
- 2019 – 2021 Porsche Macan S 3.0T
- 2019 – 2023 Porsche Cayenne 3.0T
*This product is not returnable / refundable*
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
