I have a 87' turboII with a PFC f-con w/fcd and I am wondering,the PFC came with (2) roms(chips) stage 1, and stage 2. Can someone tell me what's the difference between the both chips!I tried to search around but I didn't find any info! I have a hks to4e with all the supporting mods, I bought it with the stage 1 already installed.What requirements do I need to run the stage 2?

 

you won't find a whole lot of HKS F-Con experience here. Try posting in the 2nd gen section if you haven't already.