If you have interest in our DAZA OE turbo retrofit line kit for your iron block 2.5ltr, this boost pipe is needed to plumb the DAZA OE turbo to the intercooler on the MK2 TTRS. This tube assembly is a common requirement when installing a hybrid turbo upgrade. Comes with 2.25-2.5" reinforced silicone transition, and clamps. Each end bead rolled, tube size is 2.5". Intercooler end is sized for OE silicone connection and fits in MK2 TTRS OE location.