Upgrade Mass air flow sensor for 1.8T engines with conversion to larger turbocharger . Our upgrade 1.8T mass air flow sensor is larger and can therefore process a higher air mass. This is particularly important when converting to larger turbocharger engines, such as e. g. 1.8T to K04-001 or Garrett GT30 turbocharger. You can choose between mass air flow meters with oval and square plugs. Oval plug for: Newer 1.8T engines ME7 electronics Square plug for: Older 1.8T engines Motronic 3.xx electronics Software must be adapted! Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com