2015 - 2023 Mustang GT (S550 - 6th Gen - 5.0L)
Hey I got a 2021 mustang GT with the six speed manual unfortunately I did not get the PP1 package and the gears I have are the 355 gears and I want to get the 373 gears and my question is in the manual transmission do I need to get my speedometer recalibrated a couple shops said with an...