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We are the Leaders in Diesel Performance. We aim to increase your diesel engine performance by offering tuners that help you get everything out of your diesel truck. Hsperformancetuners.com is your destination for the latest H&S Tuners, for your Dodge Cummins, Ford Powerstroke, & GM Duramax. Get your diesel performing the way you want. Bring on the power with H&S XRT Pro & Mini Maxx tuners.