I keep hearing about dry kits and wet kits. What is the difference between the two? I would really like to know, so please help. KNOWLEDGE IS POWER. Please be specific and use lots of details. Thanks

A wet kit uses an injector nozzle that injects both nitrous and gasoline into the intake.
A dry kit uses an injecctor nozzle that only injects nitrous, it uses a fuel pressure regulator to raise the stock fuel pressure so that the stock injectors will flow more gasoline into the engine.

A dry kit is simpler to install but can only be used for small power gains.