Peter Welch, West Sussex

“I had Star*Chip fitted to my BMW Z4 2.0i. It has made an enjoyable roadster into an exciting sports car! There is more power right across the rev range. The car accelerates like a 2.5 but with an improvement in fuel consumption of between 3 and 8 mpg, depending on road conditions and driver style. The upgrade was worth every penny and would recommend anyone with this model to have the modification carried out at the earliest opportunity.