BMW F20/F22/F23/F30/F36 N55- TRS Performance Remote Tuning Dongle Model-X4 M40i B58 G02 A switch to S/M mode

A switch to S/M mode transforms the transmission and gives you shorter shift times + rev-matching downshifts without sacrificing comfort

If you're already STG3 tuned with us and you've just upgraded your injectors then this is the product to buy

allowing future tuning

The reality is this simply isn’t true

BMW F20/F22/F23/F30/F36 N55- TRS Performance Remote Tuning Dongle Model-X4 M40i B58 G02 A switch to S/M modeBMW N55 STAGE 1 & STAGE 2 TUNINGUnlock safe, repeatable performance with OEM level drivability. Quick Highlights Remote tuning via TRS Performance OBD Dongle Works through the My Flasher mobile app Custom calibration for your car + your fuel Datalogging + DTC read clear included The TRS Performance OBD Dongle is designed to be user friendly way of remote tuning via your mobile phone, simply read the stock calibration from your ECU using the on screen