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H&S Motorsports is a company based in St. George, Utah that is driven towards finding short comings in a vehicle's factory construction that becomes a limiting factor in power and/or reliability, and upgrading these ailments. The crew at HSM are undoubtedly extremely passionate and dedicated towards diesel performance.
However, its not just about building power, its about building additional reliability at the same time. For instance, their intercooler pipe upgrade for 6.7L Powerstrokes is a great solution for the failure prone factory plastic unit that are equipped on these trucks from the factory. While this product may not add an additional 100 horsepower to your truck, it solves a widely known issue that can not only limit your power building potential, but could also leave you stranded on the side of the road.
Conversely, products such as their dual high pressure fuel kit for LML Duramax's immediately add power when paired with other fueling upgrades, as the single factory CP4 injection pump is a major limiting factor on these trucks when trying to build power levels above stock. And because you're adding a second pump to the system, it makes the factory pump work at a much lower load level, meaning it will also last substantially longer.