The stock Aussie Holden $12 code isn't any good for 4 cylinder but the custom modded ose $12p from pcmhacking.net is 1 2 and 3 bar map is as simple as change the flag to suit all the tables in tunerpro auto scale to suit can run up to 8 high impedance injectors people are using them on everything from bikes to boats one boat runs 2 ecus on a v12 both real-time tunable in real-time at the same time with only one instance of tunerpro running simultaneously uploads changes to both ecus at once.pretty sure there's a few people running the external esc knock filter module on it too