Once you change the gears in your differential, you need a new speedometer gear to recalibrate your speedometer. They're inexpensive, and only take a few minutes to change.
Beefcake Racing is an Authorized Dealer for Steeda, call 1-855-827-7223, 9am-9pm EST
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov