XHP BMW Transmission Flash tune
Williams Performance are official dealers for Xhp transmission flash tunes.
Suitable for BMW 6AT and 8AT transmissions.
Xhp gearbox remaps can increase torque limits, improve shift speed, modify launch control, stronger throttle blips, plus many more features.
This product is flashed by us using our dealer tool and account.
24hr money back guarantee if you don't like the new software.