I've had several maps in the past including shark... and all I can say is I have yet to find someone who can perform/code a custom map. Not some generic bull that stretches the car to its limits but something that can be configured just right not to lead the car to an early grave. Each popular map has given me problems... despite a lot of upgrading. I made the decision last month to have the map removed and yeh the car feels a tad less torque-y but at least it will last longer and a lot of the problems have gone away.