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    Fish Tuning Diesel Switch Selectors

    Fish Tuning makes the switch hardware that lets diesel owners flip between custom tune files on the fly, rather than writing tunes itself. The DSP5, CSP5, and SOTF switches plug into Cummins, Power Stroke, and Duramax trucks alongside tuning platforms like EFI Live, Smarty, and HP Tuners. CFM Diesel Performance stocks Fish Tuning's switch lineup for drivers who want quick, clean tune-switching without digging out a laptop.

    Fish Tuning

    Why Diesel Owners Trust Fish Tuning

    Fish Tuning sticks to one job: it doesn't tune trucks or write calibrations — it builds the physical switch hardware that lets owners select between tune files already loaded by their tuning platform of choice, filling a gap most tuner companies leave to third parties.

    That focus produced the DSP5 and CSP5 selector switches and SOTF (Shift-On-The-Fly) switches, built for Cummins, Power Stroke, and Duramax applications and designed to work alongside platforms like EFI Live, Smarty, and HP Tuners with a clean, factory-look OBD-II connection.

    CFM Diesel Performance stocks a growing selection of Fish Tuning switches for Cummins, Powerstroke, and Duramax trucks — DSP5, CSP5, and SOTF switches below. Need help matching a Fish Tuning switch to your setup? Contact our team and we'll sort it out.