Both the GS 350 and GS 460 are equipped with dual Variable Valve Timing with intelligence (VVT-i), which optimizes both the intake and exhaust valve timing according to the engine and driving conditions. By continuously monitoring the engine's speed and load, dual VVT-i can deliver optimum power for each situation. Torque is increased at lower speeds for better thrust. And power is boosted at higher speeds for better acceleration. The GS 460 also includes an electronic intake valve control feature (VVT-iE), which improves responsiveness for all temperature conditions.