Range Rover TDV8 3.6D Diesel Performance Map Staffs Customer Review: Absolutely amazing what these guys can do with some software, feels like a completely different vehicle. It's smoother, quieter and goes like stink when I put my foot down, really couldn't have asked for better results and service. I Fully recommend MPG who are very friendly and really know their stuff, thanks again Buster Performance Gains Stock: 272hp Tuned: 321hp Stock: 640nm Tuned: 749 nm Previous Customer Reviews With Over 100 5 Star Reviews on Google and Facebook, it's easy to see that MPG Tuning are totally focused on providing a customer-pleasing ecu remapping and diesel chip tuning service, you can rely on. It’s no surprise that customers rate MPG Tuning so highly when you consider the training, qualifications, expertise and customer service bring to the table.