Hey All...
I have a 2012 FLHTC... Running 3.5" Screaming Eagle Slip-On Mufflers.
Stage One has been installed with the download at the dealer.
I am really thinking about switching my complete exhaust system from the stock header pipes to the Rinehart Extreme True Duals with the 4" mufflers.
My question is, Will my ecm/computer manage this change or would/should I be looking into a fuel management system?

 

Dude, you have the stage 1 dl already, you will be just fine.

 

It really depends on you.

If you're OK with decel popping, loss of power, lower fuel mileage, and just general mediocre running, then you should be fine.

 

that will not necessarily happen

 

The honest answer is there's only one way to find out.If you do it and you're happy with the way it runs fine, if not, well you know theres allot of other options out there.