What is dual vvt-i engine size?

As an AI language model, I don't have information about a specific dual VVT-i engine size, as it can vary depending on the type and make of the engine. However, VVT-i (Variable Valve Timing with intelligence) is a technology patented by Toyota that optimizes engine performance and fuel efficiency by adjusting the timing of the valve opening and closing. The Dual VVT-i technology, introduced in 2007, controls both the intake and exhaust camshafts to improve engine power and reduce emissions. Dual VVT-i engines can be found in Toyota, Lexus, and some other car brands, with sizes ranging from 1.3L to 5.7L.