Ii just purchased a set of Krome Werks slip on mufflers for my 01 FLSTCI. Now I need the stage 1 upgrade. What exactly is involved in the stage 1 upgrade. I can get my hands on a Harley stage 1 1450 EFI cartridge at a fair price but the local HD shop said that the cartridge is to be used to program a laptop and not as a replacement such as the chip on a computer controlled diesel engine, although he didn't sound real sure of what he was saying. What's the real scoop? I know HD will blow smoke when the buyer (me) is not up to speed. Please clear this up for me. TIA