Forge Motorsport Ancillary Silicone DV Boost Hoses Audi TT 225 S3 Black FM225AH Forge Motorsport replacement ancillary silicone boost hoses. Kit includes diverter valve to turbo boost pipe and the diverter valve to N75 hoses. These hoses will withstand greater temperatures and pressures compared with the OEM hoses and they look fantastic. 1999-2006 Audi TT 225