Which version of the Hydra? As I understand it, the Hydra 2.5 does not have any firmware available that will run the AVCS closed loop on a 6-cylinder engine. AVLS is not a problem as it is an on/off switch rather than a solenoid duty cycle problem. As I understand it, Hydra has chosen to do their development of features for 4-cylinder platforms and hang us 6+ cylinder folks out to dry. For STi's, drive by wire and AVCS closed loop control is already a reality. Unfortunately, that doesn't seem to be the case for us.