M159 SLS TCU Upgrade

Greatly Improved Shifting
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. 
Tuning Process: How do I get my ECU/TCU tuned? 
Key Features:
Faster Shifting
Firmer Shifting
Improved Street and Track Performance
Increased Torque Capacity