it really depends on what you want to do and how much you're willing to spend. if you can get a programmer then theres nothing stopping you. but if all you wanna do is correct that speedo, nothing is more accurate than a speedcal. when i got my gears installed i couldn't really fork over $100 for a speedcal so i just got a speedo gear to keep the speedometer a little accurate until i picked up a speedcal.