This is a special hose developed in cooperation with Nordic Tuning! The hose is fitted to the mass air flow meter in place of the original air filter box. The hose then runs through the hole behind the right-hand headlight down into the space behind the bumper / right-hand fog light. An open air filter is then fitted in that position. The hose's inner diameter at the air filter is 80 mm. This is the best solution for getting cold air to the engine, but bear in mind that the air filter may need cleaning more often and that the air filter should be fitted with protection against water splash in front of it. The hose's inner diameter at the air filter is 80 mm The air filter should be no larger than approximately 180 mm, 160 mm (length, diameter), so that it fits. Suitable air filters: ITG air filter 80 mm The hose's inner diameter at the air filter is 80 mm The air filter should be no larger than approximately 180 mm, 160 mm (length, diameter)