Quick view Fabspeed Tuning Porsche 971 Panamera S XperTune Performance Software (2017+) $1,995.95 XperTune Performance software upgrade improves horsepower, torque, and driving characteristics by reprogramming various sensor inputs, air/fuel ratios, and boost pressure (if applicable). Achieve maximum power without sacrificing driveability or... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List