Bully Dog Big Rig makes turbos for various popular CAT, Detroit and Cummins applications. These turbos are bolt-on in design, meaning they make great replacements for OEM turbos, but with a few key upgrades over a stock turbo. Each is designed with a billet compressor wheel which leads to a faster, more efficient spooling than the comparable OEM turbo. This means your truck will be more responsive and it will be easier to make power and get up to speed faster. On average, Bully Dog Turbos will make about 5 to 10 PSI of boost more than your factory turbo. You'll also see an increase in actual horsepower to the ground of between 20 to 40 horsepower. Another great feature of Bully Dog Big Rig Turbos is that there is never a core charge! And don't forget the great manufacturer warranty!