The GR Yaris was fitted with an upgraded head gasket, along with uprated head studs. Elsewhere, the intercooler was swapped out for an aftermarket version from Plazmaman, while the three-cylinder benefits from a Garrett G30-770 turbo. Powertune Australia has also fitted a turbo exhaust manifold, intercooler piping, and a dump pipe from Golebys Parts. A MoTec Yaris Plug-in ECU also forms part of the package.
2,200cc Secondary Injectors from Bosch replace the stock items. The Yaris also receives an Elixr Brushless fuel pump and a cat-back Akrapovic exhaust system. But that’s not all. Even the gearbox has been replaced with a six-speed sequential transmission from X-Shift and mated to an ATS Triple Carbon clutch.
Interestingly, Powertune Australia has decided to retain the stock rods, crank, and pistons. “We have pulled numerous engines down, and after doing a lot of comparisons and measurements, we believed we could make our target power with the stock items,” said a company spokesperson.