Superchips Australia has a great range of ECU tunes & remaps for the Holden VE Calais.
Gains of +33 BHP and +33 NM from a simple ecu tune can be achieved. Superchips flagship product 'Bluefin' lets you tune your vehicle from the comfort of your own driveway and is very fast & simple to use. If you can use email you can remap your Holden VE Calais. Simply plug your bluefin device into the vehicles OBD port and follow the instructions. You can flash your vehicle back to stock or stage 1 as many times as you like with no additional charges. The remapping process is an easy exercise.