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1. The act of spinning a turbocharger to optimum operating RPM to create boost 2. Device used to lock the axles of a differential in automotive use so that the axles work as 1 and the inner wheel travels the same distance as the outer. Also known as a locker and can come in a mini or full spool varient. Usually illegal on the street. Mostly used in motorsport type events such as drag racing, burnouts and drifting.
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