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Yes, big claims from an even bigger (FAT) man - now that I have your attention; please allow me to plead me case.There are certainly BIGGER, BETTER, & More EFFICIENT turbos on the market, but I think this turbo does all those things pretty well, while any other "Better" turbo will likely only exceed at one of those attributes. The BorgWarner S410SX - 78MM /1.32 AR is easily the best C15 turbo on earth, and here's why: 1) Its a bolt on upgrade for any single turbo cat.*&nb …

A/R stands for Area over Radius.  Area is the size of the housing inlet and radius is the the diameter of the housing.  Before every keyboard warrior jumps down my throat...this is just a basic explanation for the sake of a general overview -we don't need to get lost in the weeds, we'll leave that for scientist and engineers :)The larger the AR number, the larger the housing is.  Larger housings support higher horsepower levels, but take more exhaust gasses to turn the wheel and m …

Recently we’ve had an influx of calls and questions about turbo upgrades for C15 Caterpillars. We would like to take a second to talk about the upgrades available and help you decide which one is best for you.Before we jump into specifics on each turbo, check out the chart below – notice the difference sizing and ultimately pick out the horsepower goal you are looking to achieve. Stage Part Number Comp. Whl Diameter Comp. Whl Inducer Turbine Wheel A/R Estimated HP …