The Weistec Engineering SLS TCU Upgrade for the SLS, SLS Roadster, and SLS GT will match your transmission’s performance to that of the SLS Black Series. Shifting up and down in gears will be quicker and firmer. The improved shifting also allows for greater torque capacity which is ideal for modified vehicles that make significantly more power than stock.
Improved Street and Track Performance
Increased Torque Capacity
Please note this requires the removal of your TCU, this will need to be shipped to us where we will make the changes and return once completed.