TTE420 Upgrade Performance Turbocharger VAG 2.0 TSI EA888


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Jul 9, 2014
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TTE420 Upgrade Performance Turbocharger VAG 2.0 TSI

TTE420 begins as a brand new standard BorgWarner K04-064 turbocharger that we dismantle and then set about upgrading and optimizing as engineers to create our ultimate K04 frame hybrid for the EA888.1. TTE420 Turbocharger is great power stage for the 2.0 TSI range of vehicles while retaining like OE fitment.

Engineered & Enhanced

The formula to making a TTE420 starts with a much larger 2871X TTE billet compressor wheel, chosen because is highly efficient, new generation type with very thin blades, creating extremely high flow for comparative size, giving a compressor map that's very wide. The Re-profiled compressor cover is machined to an optimized tolerance to ensure maximum compressor efficiency. We blank of the original PCV port as not required and fit our TTE smooth flow optimized billet blanking plate cover. The intake pipe is CNC ported and hand finished with the TTE smooth flow cover fitted to give a smooth tract and transition for the incoming air for the ultimate flow.

We also fit our Billet CNC TTE Boost adapter & silencer delete. Removing any restriction so improving the flow and enhancing the sound. We CNC mill the compressor cover to accept our CNC Billet TTE Recirculation Valve Adapter to fit an Original VAG Recirculation valve to give OE like fitment with trouble free operation.

A key part to driving the large 2871X compressor and in turn making this unit produce the huge power advantage over stock, is machining and fitting a far larger BorgWarner K16 curved clipped turbine and shaft, while still keeping the k04 core, this is not so easy to do. This K16 turbine gives much lower back pressure and keeps EGT lower compared to stock K04 turbine or clipped stock.

The clipping of the K16 turbine reduces blade area thus increasing gas flow and so reducing back pressure and lowering exhaust gas temperatures, allowing safer higher boost level's. This process also gives a secondary advantage of removing some material, lightening the turbine thus reducing rotational mass improving moment of inertia. Dyno's have shown little loss in response vs stock K04 yet huge gains in power and torque.

Special TTE developed in house 360 deg high performance motorsport journal bearing system is fitted. Durable at high loads with no loss in transient response.

Actuator used is uprated sprung OE unit, fitted with our reinforced clamps for trouble free operation.


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, Exhaust manifold & Components
TTE 2871X Billet Highly Efficient Next Gen Compressor Geometry
Optimized Compressor Cover Machining Clearances
TTE CNC Billet Smooth Flow Optimised Intake Port Cover Blanking Plate
VAG Genuine Original Recirculation Valve Included (latest generation)
Genuine OEM Pierburg N75 Valve
CNC Ported Hand Finished Intake
CNC Billet Direct Recirculation Valve Adapter & Port
CNC Billet Boost Adapter & Silencer Delete
Genuine BorgWarner K16 Turbine, Clipped & lightened
Genuine BorgWarner Uprated & Reinforced Actuator
Special TTE K16/K04 Reinforced Bearing System
Fitment As Original. Plug & Play
Dynamically Balanced
420+ PS Capable
Designed, Machined & Built by TTE in Germany


Fits bellow :

A3 (MK2) / Q3 / TT (MK2) / Beetle / CC / EOS /GOLF / GTI (MK5 / MK6) / Jetta / GLI / Bora / Sigitar (MK5 / MK6) / Passat (B6) / Scirocco / Tiguan / Altea / Leon (MK2) / Toledo (MK2) / Yeti / Octavia / VRS (MK2) / Superb (B6)
Engine Codes:


Reconditioning price shown is based on overhauling and reconditioning, upgrading a undamaged used as new turbocharger within specification. Only once cleaned and dismantled, inspected then a firm price be made.
Kevin Andries Perfect Golf GTI 2.0 TSI TTE420 DVX performance tuned.

453.4HP 604Nm 1,6bar to 1,45 red line

GOLF GTI MK6 TTE420 TSI Software by R-Tech

Approx 1.5bar peak for 410hp 98ron (no wmi). Loads of power potential in the tank if the owner wants more


Evolution Performance / STO-Tuning/MRC Tuning South Africa

MK5 GTI TTE420 Hybrid fitted and tested on 98ron fuel with MRC Tuning software.
Result : 443HP 395 FT-LBS

TTE420 is still considered the best k04-064 hybrid money can buy and with that result above, who is to argue..