Virtually every vehicle made since 1992 is equipped with an electronic speedometer. Numerous computer-controlled functions on your vehicle use that electronic speed data to do their job, including the engine control module and the anti-lock brake system. Big tires and gear ratios can send bad data to these systems, but Superlift's TruSpeed Recalibrators correct for these factors. Just plug it in-line with your speed sensor and adjust it for your modifications!
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