Well, my dad just got me a reverse glow white face gauge set for my 03 mustang. However, he bought me the GT version (speedo goes up to 150 obviously). Now, Can I just plug it in and be all set? Or do I need to re-calibrate it. If I need to re-calibrate it, ill probably just have him return it and get me a 120 mph one.

But if I can use the 150 mph one, ill take it .

 

I would just send it back.