The Snow Performance Stage 2 Boost Cooler is a water-methanol injection kit designed for Chevy and GMC Duramax diesel engines, including LBZ, LLY, LMM, LML, and L5P models. It aims to lower exhaust gas temperatures (EGTs) by 100-300 degrees and boost horsepower by over 65, while promoting cleaner, cooler engine operation. The system features a progressive VC-50 controller with a 52mm gauge that manages two water-methanol nozzles, injecting more or less fuel based on boost pressure for precise delivery. This setup enhances performance and drivability across the entire boost range, with adjustable start and full points to match engine requirements. The controller combines boost gauge and water-methanol control functions, featuring a 7-color OLED display showing boost, injection percentage, fault codes, and nozzle activation, allowing customization to OEM gauges or personal preferences. The kit includes a 7-gallon tank for ready-to-install operation.

Designed for all Duramax models from 2006 to present, including LBZ, LLY, LMM, LML, and L5P engines, this water injection system is ideal for daily drivers, light towing, and performance enthusiasts seeking cooler, more efficient engine operation. It is a bolt-on upgrade that provides significant temperature reductions and horsepower gains without extensive modifications. The kit includes the VC-50 controller, dual nozzles, and a 7-gallon tank, offering a comprehensive solution for improved engine cooling and performance across the boost spectrum. Suitable for street use and light towing, this system enhances engine longevity and power delivery while maintaining reliability.