type of hho kit and average gains for my engine

by mike
( paramaribo-suriname)

i own a lexus gx470 2006 with the v8 4.7 litre gasoline engine

which hho-kit do i need for this engine and what are the known gains in power and mileage
can you also provide me with the right fs2 chip for this car

thank you for your effort and wonderfully informative website