I understand HD can do a reflash, but i figure with the stock ECU it sort of tunes itself to run at the stock AFR. Basically even though the air cleaner will allow more air, the ECU will not allow it to take in any more until you teach the ECU to do differently. Same with exhaust, you can run a freer flowing exhaust, but without the reflash it will only adjust to run at stock AFR. So no performance will be gained. I figure I would save the money until I can get the exhaust and Power Commander.
Currently i have a nightstick slip on exhaust, but didnt do the HD reflash.
'10 Red Custom:
check out my build thread for pix and mods
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