That seems reasonable because the 2014 rules allow it.
Quote:
5.4 Variable Geometry Systems
5.4.1 With the exception of devices needed for control of pressure charging systems and/or exhaust turbine geometry, variable geometry exhaust systems are not permitted.
5.4.2 Variable valve timing and variable valve lift profile systems are not permitted.
5.4.3 Variable intake manifold and trumpets are allowed.
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That will give them a bit more low end torque. Toyota has to do something in order to compete with the broader torque band of the turbocharged Audi and Porsche.