Ive got one in my line, dont think you need one in your XR. But then again youd be a dickhead giving it some stick 5 mins prior to stopping the car and turning the engine off. All turbos work the same, they overheat and need time to cool down, whether you cool it down while its getting lubricated (with turbo timer) as the engine is running or not (without turbo timer) is your choice... I cant see a turbo timer harming your xr6. Infact you can make one yourself for around 20 bucks... just go JayCar... I got a Blitz one in my car as it came with it, it also works with my immoboliser and alarm. Alternatively, dont boost it 5 mins prior you come home/work... I dont think turbo needs any boosting when the xr6 is on the freeway as it has a big barra to take care of that.