Hello! I’m new here and in the project my 9-5 with a chip tuning something to revive with great interest the unfortunately older contributions to the Hirsch Step 1. An article spoke of maptun as an ALternative. I found myself at http://www.partsforsaabs.com/bsr_ppc.php an extremely exciting thing, which runs without expansion of the ECU. Instead one gets a KISTE which is reprogrammed via the Tech2-connector(what is that) the ECU (called PPC). Abbott-Racing… What to take? What are advantages or disadvantages? Who has experience with HIRSCH, ABBOTT, MAPTUN and finally with this PPC system? A thousand thanks in advance.