TTE850+ RS4, S4 B5 Turbochargers Something for the power hungry B5 owners. We invested much time and effort with maybe the most famous S4 B5 owner Philiip keass, to come up with this spec. Huge power with good response. These units are 1 off 2 Porsche turbocharger steps TTE offer to increasing your 2.7T motors performance for huge power potential. On a good build 3,0L engine these turbos have 2,5 Bar @ 4000rpm! Engineered & Enhanced TTE850+ Turbochargers are based on Genuine BorgWarner Porsche K16 turbine housings and cores with Genuine BorgWarner anti surge compressor covers. TTE CNC machine in house to a optimum clearance the Anti surge compressor cover to allow fitment and maintain efficiency of a larger highly advanced billet milled 7+7 blade high pressure compressor wheel. The Compressor wheel is a Genuine BorgWarner 7 bladed billet milled high pressure anti surge geometry compressor wheel, features promote greater airflow and pressure using a low inertia wheel that performs like a wheel of even greater size and mass. 7+7 Blade technology enables lower boost threshold giving the user faster spool-up at lower engine speeds while providing the high boost with much less heat for powerful top-end performance. The K16 exhaust turbine housings are CNC milled in house to allow fitment of the larger K24 turbine to a optimum clearance for maximum efficiency. We also modify exhaust entry port from a stock size diameter, increasing the size of the throat to increase the flow capacity before the turbine and perform other modifications after the turbine for increased performance. Turbine and shaft being BorgWarner (Porsche) K24 items. K24 turbine is clipped at BorgWarner. Clipping reduces the blade area thus increasing gas flow and so reduce back pressure and lowering exhaust gas temperatures, allowing safer higher boost level's. This clipping also gives a secondary advantage of removing some material, lightening the turbine thus reducing rotational mass improving moment of inertia and spool. Genuine BorgWarner motorsport 360 deg journal bearing system are fitted, to remain durable at higher loads with no loss in transient response. Actuators used are uprated sprung OE units fitted with our reinforced clamps for trouble free operation. These also can also be modified/set to customer needs and specifications. These are supplied in kit form to allow the end user to custom fit as required. Equilibrium 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 anti surge 63.5mm inlet compressor housings (Viton O-Ring seals inc) Genuine BorgWarner K16 exhaust housings, Ported & Modified for greater gas flow Genuine BorgWarner Latest Billet compressor geometry Genuine BorgWarner K24 Turbine, Clipped & lightened Genuine BorgWarner Reinforced Motorsport bearing system Genuine BorgWarner Modified reinforced and synchronized actuators supplied in kit form for custom fitment Single parts finely balanced then components assembled and high-speed VSR balanced Supplied with a serial numbered balance test document for each turbocharger 850+PS proven Designed, Machined & Built by TTE in Germany Brand new Price is 4032.77 Euro net (For customers in EU countries 19%+ VAT Must be added to prices above unless have a valid VAT ID) Shipping does vary but 45.00 euro is a good guide for Europe wide. ATTENTION: These turbochargers need custom installation are not Plug & Play.