And test them before you install them. Streetglow is known for shipping bad transformers for the gold series, but they do come with a lifetime warranty.

My 1st underbody kit I had gotten 4 years ago was made by liteglow (won them in a speed shop contest) and yes they took on water like crazy everytime it rained and they eventually burned out 3 months later, after that I bought the Street Glow gold series and never had that problem again. they are pretty much air tight however you still near to be careful they will break especially if not installed right or if you hit an animal on the interstate like I did once.