Product description: Audi TT 180 hp 1.8T performance upgrade to approx. 230 hp / 335 NmThe kit includes:- KKK K04-001 turbocharger- Reinforced intake hose- Modified bypass valve- 4x 380cc fuel injectors - BMC high-performance sport air filter for 1.8T- Optimized ECUThe ECU must be sent to us, or you can schedule an appointment at our location. You must use at least 98 octane fuel!The following components are also required for Kit 2 to achieve the desired performance: Stainless steel exhaust system 63.5mm http://www.turbo-parts.de/Abgastechnik/Abgasanlagen/Audi/TT-180PS-8N/Auspuffanlage-Sportauspuff-fuer-Audi-TT-180PS-8N-2WD-1-8T-o-63-5mm-Edelstahl-TUeV::1482.html1.8T 76mm stainless steel downpipe with 200-cell racing cat http://www.turbo-parts.de/1-8T-Tuning/Hosenrohre/Hosenrohr-Downpipe-1-8T-o-76mm-Turbo-bis-15PS-mehr-Golf-4-mit-Rennkat-200-Zellen::820.htmlLarge intercooler