My 2003 Mazda 6 S needs new front shocks. I was thinking of upgrading to some performance shocks. If i upgraded the front would I also have to upgrade the rear? or can I just upgrade the front? (on a very limited budget).
The Pro Kit was designed for stock shocks. A KYB GR2 would be a sufficient replacement. If you wanted adjustability or longer life with added control the Koni sport or Bilstein B6 are frequently used.
I have Racing Beat springs and older KYB GR2's and they perform reasonably well. My next pair will be the Koni.