AIRTEC Motorsport Big Boost Pipe Kit for Yaris GR Stage 3 Intercooler - ATMSYGR13A direct replacement kit that offers increases in performance and response, the enlarged boost pipe kit features a freer flowing design with a increased internal diameter on both the hot side and cold side. With an enlarged cold side design that increases the pipe diameter by 50% to allow fitment to our Stage 3 intercooler with 60mm inlet, making it ideal for cars fitted with hybrid turbos