Did u have to tune something after installing those spacers?
No, you do NOT have to tune the car with those spacers on. As with any mod, a tune makes them perform better but you will not set any check engine lights or anything. I had them on my Fusion without a tune for over 6 months. I am a person that does all the surrounding mods first before I use a tune, that way I don't have to keep tuning the car.