haven't heard of a high flow intake...but the cold air intake and short ram will both be a high flow intake...because they have bigger, better filter design than stock and have bigger, better, smoother design for the piping...short ram is worse than cold tho...basically same as 96jdm said...cold air = dense air = more 02 molecules = better power...u have small chance of hydrolocking...soembody on the board just did it...but think bout how many times u see or will plan on seeing a 16" puddle...the filter needs to be fully submerged to hydrolock...no big