This short hose runs between the intercooler and upper and lower intercooler pipes on ALH engined TDIs. Will not work on the intercooler for PDs as they have clip connectors. This pipe is also used for connecting the stock PD airbox to turbo hose to the 17/22 turbo. It's also used when replacing a stock PD intercooler with a Eurojet cooler and upgraded intercooler pipes.