The ASAtronic is far from a piggyback system as the only dam thing it does is change the voltage inorder to trick the ecu and keep the SES light off.
Renn-Sport is developing software for the ASA SKI I which I am wating for patiently. This software just tweaks the original bmw ecu config.
The kit runs perfect w/o the software, I just want it so that I can upgrade my injectors and pulley and push my HP into the 400's.
Look out lil man, im comming for you .....