I have heard stories about the 85MM MASS AIRFLOW METER For Holden VS-VY V6

This item does require a custom dyno tune. To be honest if you were planning on getting a custom tune done solely for the purpose of only supporting this MAF, then I wouldn't worry about it.If you are not interested in going down that path, you can provide us with some vehicle details and a list of modifications carried out (if any) and a general idea of what you would like out of the car, we can then recommend products to suit your needs/budget.