€1,763.87 *

Prices Do Not Include VAT. Shipping is calculated at checkout.

Delivery time 50 Working Days

Select TurboCharger Option (New or Reconditioned) - Choose an option to send your turbo to TTE for upgrade or have a brand new turbo upgraded:

Exhaust Porting:

  • SW10034.3
AUDI RS4 / S4 B5 / A6 C5 ALLROAD TTE550 UPGRADE TURBOCHARGERS  The first TTE step to... more
Product information "TTE550 RS4 UPGRADE TURBOCHARGERS"


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 little 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 near OEM drivability.

See below for example of an RS4 K04 Stock car VS RS4 TTE550 Mrc stage 3 tuned 99ron.

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 an exducer of 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 maximize performance.

The TTE 2280X compressor wheel design features promote greater airflow using a low inertia wheel that performs like a wheel of even greater size and mass using BorgWarner geometry. 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.

We CNC mill the turbine housings to a bigger size and replace the standard BWTS K04 Turbine and shaft for the Larger TTE 9 blade turbine for increased flow and power. The 9 blade turbine reduces the back pressure and lowers exhaust gas temperatures, allowing safer higher boost levels. This lower blade count also gives a secondary advantage of removing some material mass, lightening the turbine thus reducing rotational mass improving moment of inertia.

Special profile BorgWarner 360 deg high-performance motorsport journal bearing is 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 the 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 a serial numbered balance test result document.

  • TTE Billet Highly efficient compressor geometry
  • TTE 9 BladeTurbines, Larger Size
  • Genuine BorgWarner TTE reinforced and synchronized actuators
  • Genuine BorgWarner Reinforced motorsport bearing system
  • CNC Ported compressor inlets
  • Plug and Play Installation for RS4(S4/ A6 require K04 inlets) 
  • 550 PS+ proven
  • Single parts finely balanced then components assembled and core high-speed VSR balanced
  • Supplied with a balance test result document
  • Proven TheTurboEngineers quality
  • Software recalibration is required 
  • Made in Germany
  • Price shown is for a PAIR of turbochargers 

Please check out our TTE HEAT SHIELD ISOLATION ADD-ON option that’s available.  




These turbochargers use K04 RS4 B5 compressor housings and turbine housings, RS4 B5 specific turbo intake pipes are required for S4/A6 fitment.
Exhaust option available at extra charge for TTE550 RS4 k04 Upgrade turbos

44mm CNC ported exhaust entry to smooth the transition from the bigger diameter THE-tuner exhaust manifolds for maximum performance.
RS4 TTE550 CNC PORTING OPTION photo TTE550 CNC PORTING_zpspt2mwlnl.jpg

Important Upgrade Turbocharger Information - Sending Your Turbocharger - Click Here

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