Installation of Yellow Box Speedometer Recalibrator The Yellow Box (YB) speedometer correction recalibrator corrects for built-in manufacturer speedometer error as well as the additional error caused by the installation of smaller or larger sprockets. Built-in ...
S13 and S14 Speedometer correction options *write up* - Nissan Forum | Nissan Forums
Speedometer correction! - Pelican Parts Forums
How to Recalibrate Speedometer | Tire Size Speed Calculator | Tire Size and Speedometer Accuracy | Discount Tire