The Boost Cooler® is Snow Performance's latest generation water/methanol injection system. The primary function of water/methanol injection is to provide "chemical intercooling". 

In diesels, the effect is three fold: 1. The intercooling effect provides for more available air and all the benefits of a higher positive pressure ratio (more power giving fuel can be utilized safely without high combustion temperatures). 2. The combustion of water provides for more power on the power stroke. 3. Methanol acts as an additional fuel for more power.