This helps the engine draw in more cool air, thereby improving throttle response and increasing bursts of horsepower. For A4 For Avant 1.9 TDI Air Intake Rubber Turbocharger Intercooler Hose 3B0145838A Effectively improve the engine's air intake efficiency, improve combustion efficiency, enhance horsepower output and fuel economy maximizes airflow, improving fuel efficiency and protecting your engine from harmful contaminants and debris. Designed for user-friendly operation, installation can be completed quickly without the need for professional technicians, helping you restore your vehicle to normal operation as soon as possible., Manufacturer: gangxiao