Nope. A electronic speedo recal is made. I ordered mine through cj pony parts. I think they get it from texas
mustangs. Be careful though. The way it re-calibrates you speedo is through a binary code that the computer reads. When I purchased mine, the binary code that came with it was wrong. I ended up taking my car to cj pony parts and they called Texas mustangs to get the correct code and then reinstalled it for free.