This is for a Performance plug and drive OBD2 chip tune upgrade,we do the upgrade for VT,VU ,VX,VY , VZ and VE both V6 and V8. Gives up to 35% more power 25% more torque and give better fuel economy. Designed and written by American dyno tuners and manufactured in China as a cheap and easy way to get the best from your car.The chip tune upgrade connects with the OBD2 diagnostic connector, reads the data from the computer from the car analyzes it and creates a upgraded program for the car. When you disconnect the retune computer from you car it reverts back to the original factory settings.The upgraded tune is always within factory parameters and cannot damage your motor or harm your driving style, in fact it increases response times and retunes to your driving style.This upgrade is ideal for v6 3.8 and 3.6 motors where the computer is not able to be upgraded by other means, also works for v8, 5.7, 6 and 6.2 liter motors where you don't want to pay out $800 plus for a dyno retune.The best gains are from where the air intake and exhaust have been upgraded, and you want to take advantage of the gains, but, your std holden computer is not made to be able to give you the gains in its standard form. Not withstanding the standard car still can make great gains, as well as cars with rewritten computers as this retune is done in real time and adjusts to the way you drive. We give a 100% money bank guarantee. KEY word ECU, CPU ,holden computer, holden chip,rechip.NOTE photo is sample only.