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Pro Tune II Software and Variable Fuel Injection (VFI) Calibrations

The NEW ProTune II 3.6 software is compatible with 64-bit and 32-bit operating systems (Windows® XP® SP2/Vista®/ 7 / 8). It offers two levels for tuning your S&S VFI (Variable Fuel Injection) Modules, basic level for general tuning and advanced level for detailed tuning. The requirements of a specific tuning job and the tuner's level of skill should determine which level is used.
ProTune II 3.6

ProTune II Manual

PT2 Maps/Calibrations

We have combined tune-files with their appropriate ECU code into one file to create what we have termed Box files. When utilizing the new Box files (calibration files with a .box extension), ProTune II version 2.4 or later must be used. Box files allow the user to load one file to their ECU, eliminating the need to manually match a tune-file with an ECU code


This ECU code and Tune Files for current ProStock motors.
: The Tune Files must be used with this ECU code. The *.ec2 file is to be used with the original ProTune software.

Customer Tune Files

If you are looking for more tune files, check out files that our customers have uploaded.

Unrestricted S&S VFI modules and Pro Tune II software must not be installed or used for tuning of pollution controlled vehicles.

These vehicles have specific calibrations to meet emission regulations. Modifying or installing an unapproved calibration or module is considered tampering and is punishable by law.