After swapping in different gears, you’ll need to adjust the speedo to read correctly.

2002 and earlier cars can swap the mechanical speedo gear to get the speedometer to read correctly. 3.55, 3.73 or 4.10 all uses a 23 tooth speedometer gear. For more precise adjustment a speedcal is suggested.

2003+ cars have no speedo gear and require a computer tune to calibrate the speedometer.