If you've changed your truck's tire size or rear axle gears, chances are the speedometer reading is off. Because many late-model trucks use the vehicle's speed to also determine fuel delivery, shift points and more, TS Performance developed the ReSpeed speedometer calibrator and speed limiter removal unit. The ReSpeed recalibrates and corrects your vehicle's factory speedometer to fully optimize your engine's performance. For more information, contact TS Performance at (270) 746-9999 or www.tsperformance.com.