all depends on what you want really.
Read this
article. It is a few years old, but it will or at least should explain what happens. Its about a SHO, but we have the same basic intake design with our intake being 'less' aggressive than the SHOs.
A wet kit is more prone with back firing through the intake as well. However, if you start off small and work you way up to the level you want, you should be fine with a wet kit. Just make sure you educate yourself about the N2O and be safe when using.