With 257 horsepower on tap, the Toyota GR Yaris is a veritable pocket rocket. In Japan, it's slightly more powerful by packing 268 hp from its turbocharged 1.6-liter engine. The same G16E-GTS unit is also found in the GR Corolla where it produces 300 hp. In an attempt to squeeze out a ludicrous amount of power from the little three-pot mill, Powertune Australia has heavily revised the engine to match one of the newest supercars – the McLaren 750S.
The three-pot has been massaged to deliver a massive 741 horsepower (740.9 hp to be exact) at 8,117 rpm. It produces a whopping 462 hp per liter while retaining the original crank, pistons, and rods. Contacted by CarBuzz, the New South Wales-based aftermarket specialist said they've fitted a Garrett G30-770 turbocharger, a beefier head gasket, an Akrapovic exhaust system, a new intercooler, and a custom turbo exhaust manifold. To make everything work in harmony, there's a new Motec ECU.
