I've searched speedometer and cable and all I was able to come up with was that its electronic instead of a cable and that its down at the tranny. I could of sworn awhile back reading on here that one of the companies in Japan made one like RE or Knightsport. Wouldnt Mazda Japan have them as the 4.3 gears were available on the later models? I'm running 255-40-17s in the rear and plan to keep it that way for some time. BTW, whats the actual install if such a thing exists?

Thanks!

 

BUMP I'm running into the same problem before I get my 4.33 rear end! Also have the same rear tires.

 

Mazda part # R507 17 400B

 

So all I have to do is swap that one part and the speedo will be recalibrated? Also I tried the p/n in my Mazdaspeed account, doesn't work? Thanks

-Andy

 

Probably have to source out of Japan or one of the other "99 spec" vendors. Was fitted to all the 17 inch wheel production run.....happily that tyre is the correct one as well!