Product description: Audi S3 8L 209 hp 1.8T performance upgrade to approx. 300 hp / 395 NmScope of delivery: - Turbocharger upgrade Borgwarner K04-023 with large impeller 56>45mm - 4x 470cc fuel injectors - Software tuning - Reinforced intake hose in blue or black (specify when ordering) 380902 380903 - Reinforced bypass valve 330100 - BMC high-performance sport air filter for 1.8TThe 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 parts are also required for Kit 3 to achieve the desired performance: Sports exhaust ø 70mm1.8T S3 76mm stainless steel downpipe with 200-CPI racing catalytic converterFront intercooler kit S3