Optimized SMG transmission software, available both for NA (Stock and ESS NA tuned) and ESS Supercharged applications. Increases shift firmness in S4/5/6 and increases launch control RPM to 3800RPM on US spec M3's.
When you order this product, you will receive information on how to remove your transmission control unit for shipment to a ESS reprogramming center near you.
Zoom 
