dual maf is just and extensive mod to dual pop. Many people run dual POP. I my self dont do mudding or rock climbbing in my Z. i have only put 2000 miles on my z in 9 months. I dont drive my lowered Z in flooded areas. I have a DD for that. guessing those dual POP chargers are at least a foot high. if your driving you Z in 1 foot on water you have problems