I needed to have the speedo fixed due to the install of the 4.56s but I installed the Diablo Predator and you can't fix the speedo with the Diablo. I had " PCM FOR LESS " install their tune for SSRs and modify the speedo. The speedo was then checked with my GPS and it is "right on". Bryan from "PCM FOR LESS" did a hell of a job and other Fanatics might be interested when changing over to 4.56s to use this company. PM me if interested in their tele number.....they have a place in North Carolina and an office here near Pittsburgh.
Hopefully I didn't break any forum rules

but just trying to help the SSR Fanatic community.