I have a 2004 Heritage Classic FLSTCI. It came with the Stage 1 EFI kit and Screamin' Eagle 16 Gauge exhaust. I am replacing the exhaust with a stock cross over fishtail exhaust from a 2002 Heritiage Classic Springer. My local dealer told me I would not have to re-calibrate anything. Can anyone confirm this? Thanks.

 

He is correct. As long as the stage 1 A/F is on there you need the download, switching back to stock exhaust will restrict the flow but you'll be ok with that download but you'll loose a few HP with the stock exhaust.

 

Thanks for the reply. I figured I'd loose a little hp, but I wasn't sure about the rest. The stage 1 A/F will definitely stay on.