Just curious if there is a way to adjust the speedo if you make wheel and tire changes or in my case installed an STI gauge cluster? Normally changes can be made with tuning software as in my civic and mustang. I have my WRX tuned by opensource with romraider and I can't find and area that has revs per mile to compensate for larger or smaller tires.
It's not much but my STI cluster reads about 4mph high as verified by GPS and radar. I have OEM tires on my WRX, putting STI diameter tires may do the trick. But most new cars' clusters are electronic so changes are made with the flash.
Does the WRX have a speedo gear in the tranny?