Your Speedo and Odo will both be off by 6%. So an indicated 25 mph would be about 26.5 actual. An indicated 60 would be 63.6, and an indicated 75 would be 79.5. You can always use a GPS to check. Most factory speedos read pretty close to actual or a bit high, so your difference may be a bit less.
ETA: I now see Rock Chuck said the same thing earlier with fewer words.
Last edited by K1500; 10/19/21.
