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jedi-knight83 said:
what exactly is the point ... apart from being quite cool?!
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In a boost gauge? So you can see what the car is doing. The best gauges to have are oil temp, water temp, boost pressure and air fuel ratio... This way you can keep an eye on the vitals and make sure the car is running as it should. A boost gauge will allow you to make sure the car is boosting correctly
Rich