Fish Tuning FTCSP5SHORT – 5.9L | 6.7L Cummins CSP5 Switch (Short Version)

Upgrade your 2006–2021 5.9L or 6.7L Cummins with the Fish Tuning CSP5 Short Version switch (FTCSP5SHORT). This is the clean-install version of the popular CSP5 switch, designed for a discrete, near-stock look.

Key Features

• Short version with mounting bracket — Positions the rotary switch right next to the OBD-II port for the cleanest possible install with minimal visible wiring.
• Replacement OBD-II connector — Pass-through design keeps the factory look while allowing other devices to connect when needed.
• On-the-fly tune switching — Change between your programmed tunes instantly without reflashing the ECM.
• Broad tuner compatibility — Works with EFILive®, MM3, Smarty, and RME tunes (EZ LYNK® support depends on the specific tuner setup).
• LED indicator — Orange/yellow LED on the back confirms proper installation and operation.
• Last-tune memory — Remembers the selected tune through key cycles as long as the ECM has power.
• Includes strain-relief ty-wrap for added durability.

Fitment

2006–2021 Dodge/Ram 2500/3500 with 5.9L or 6.7L Cummins.

Note for 2018+ EFILive users: You will need the Fish Tuning 2018–2022 Cummins Bypass Cable to flash the ECM. Important: Do not attempt to read or write to the ECM with the CSP5 switch plugged in — unplug the switch before flashing.

Perfect for owners who want reliable, switch-on-the-fly control without cluttering the dash. The short version + bracket combo is ideal for a professional, low-profile installation.