The new Sirio EVO III line of engines feature a new crankcase to increase flow to the combustion chamber. Port timing and induction timing have been changed to increase torque and driveability. The result is an engine with tons of dirveable power and it’s easy to tune. The Sirio EVO III STI engines have all the "extra" touches that a true "team" engine has and they are now available to the public...
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