TTE550 Upgrade Performance Turbochargers RS4 / S4 B5 / A6 2.7t


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Jul 9, 2014
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TTE550 Upgrade Turbochargers RS4 / S4 / A6 2.7t

The first TTE step to making your 2.7 TT motor shine. You the driver will feel RS4 K04 response with near RS6 unit power yet still keeping RS4 turbine housings. 550+PS capable.

Engineered & Enhanced

TTE550 Turbochargers start life and evolves from Genuine RS4 K04 OE units that are Engineered. These units offer you more performance yet offer near no loss in response over stock K04 once tuned with correct hardware & software. Very popular with owners wanting RS4 plug & play fitting units but with greater and wider performance to over 550PS but still keeping OEM drivability.

See bellow for example of an RS4 K04 Stock car VS RS4 TTE550 Mrc stage 3 tuned.

Performance with Durability

TTE550 RS4 compressor covers are CNC machined in house to an optimum clearance to allow fitment and maintain the efficiency of a larger more advanced Billet 2280X Extended tip compressor wheels with inducer size of 45.1mm with a exducer 59.4mm Vs stock 2078 standard compressor with an inducer size of 39.9mm and exducer 51mm. We also as standard CNC mill the air inlet port on the compressor housing to remove a lip right before the compressor wheel to smooth the transition to the intake pipes to maximise performance.

The 2280X compressor wheel design features promote greater airflow using a low inertia wheel that performs like a wheel of even greater size and mass. Extended tip technology enables the user to have faster spool-up at lower engine speeds while providing the boost for the powerful top-end performance. Turbine and shaft are TTE 9Blade items for increased flow and power

Special profile BorgWarner 360 deg high-performance motorsport journal bearing are fitted, to remain durable at higher loads with no loss in transient response.

Actuators used are uprated sprung Genuine OE units fitted with our reinforced clamps for trouble free operation. These also can also be modified to customer needs and specifications.


Precisely balancing our turbochargers is a key critical factor to become a TTE upgrade unit as longevity and performance are paramount. Good balance improves acoustics also. Subsequent great care is taken with all TTE turbochargers to achieving our balance standards. Firstly parts are balanced at slow speeds up to 2800RPM in multiple planes using our single parts machine, then components are assembled and then the CHRA are dynamically balanced, but this time depending on application at up to 250,000 RPM in multiple planes using our in-house VSR machine to acquire the ultimate equilibrium, to a standard far higher than OEM. Each turbocharger is supplied with serial numbered balance test result document.

Key Points:

Genuine BorgWarner Housings and key components
TTE 2280X Billet compressor geometry
CNC Ported compressor inlets
TTE 9Blade Turbines
Genuine BorgWarner Reinforced Motorsport bearing system
Genuine BorgWarner Modified reinforced and synchronised actuators
Single parts finely balanced then components assembled and high-speed VSR balanced
Supplied with a serial numbered balance test document for each turbocharger
Installation as original RS4 K04
550PS Capable
Designed, Machined & Built by TTE in Germany

Pricing :

Reconditioning price shown is based on overhauling and reconditioning, upgrading an undamaged used turbochargers within specification. Only once cleaned and dismantled, inspected then a firm price be made


These turbochargers use K04 RS4 B5 compressor housings and turbine housings, RS4 B5 specific turbo intake pipes are required for S4/A6 fitment.

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100-200 PULL

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RS4 STOCK Vs RS4 TTE550 MRC (Stuarts Cross car) 99 fuel

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Stuart Cross RS4

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Note: See the center hub on the billet TTE550 Compressor wheel. The Hub design bellow the nut is very slim and narrow to maximize the flow

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561ps 750Nm

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Stock s4 motor
TTE550 Turbos
deka 630 injectors
Jhm front mount
3" Downpipes
98 Fuel

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Unicorn Custom software

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New option available at extra charge for TTE550 RS4 k04 Upgrade turbos.
44mm CNC ported exhaust entry for upgrade manifolds. Matches
THE-tuner as an example because many requesting for these.
Retail Price is an extra 500.00 euro inc VAT(pair)

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RS4 B5 TTE550
MRC Tuning software
570ps 750nm (99ron / no wmi)

AUDI S4 B5 TTE550 BY USS Performances & C2Motorsports Swiss

608cv / 784NM

100 - 200 km/h 6.54 sec ( 2 passenger )

Fastest & most powerful TTE550 car in the world!

C2Motorsport custom software


• TTE550
• E85
• Forged engine


RS4 TTE550 By KSF Motorsport

MRC Software 102ron fuel

560ps 769Nm

Sam Tomkins RS4 B5 TTE550 tuned by 2.7T motorsport

The tune is progressive starting at 1.55bar at 3600rpm and peaking at 1.7bar higher in rpm to preserve the internals of stock AZR.
Power is 621.5bhp(630ps) and 550ftlb(756Nm) with more than 700Nm avalible from 3600-6400rpm.
FATS = 2.47sec
100-200 = 6.87sec with full weight and 4th gear only. :respekt:

100-200 = 6.72 full weight 3-4 gear