sku: 101-06 x35d 286hp ESS E-Flash ECU Performance Software ESS optimized ECU software is a result of 100's of dyno runs and exact calibration of all parameters to allow maximum performance gains with improved driveability/fuel consumption. When ordering this product you will receive 1 ESS E-Flash OBD2... MSRP: Now: $1,195.00 Add to Cart Compare Selected