I have a 2013 Road King Standard with 103 CI Engine and I want to know if I replace the stock headers with Jackpot 2-1-2 Headers (No Cat) and replace the stock mufflers with Vance & Hines 4 inch Twin Slash slip on mufflers and keep the stock air cleaner assy, do I have to retune the ECM?

 

Yes, you will need to remap your ecm.

 

No, you won't need to. Replace the A/C and you might want to think about a tuner but plenty of people go without one.

 

Yes, you have to re-tune because now you changed the exhaust flow.
Less back pressure and no cat.
If I was you I would do the air cleaner and then set her up right.
Good luck and ride safe.

 

This is a forum so anyone can have an opinion, right? The stock AC is not pulling 100% with stock exhaust. Now you add header and pipes and you don't think more air is moving through the pump? I vote tuner!

 

The OP's question was "do I have to retune the ECM?" and the answer is no, he doesn't have to.

 

BUT for the best performance of that motor I say yes.
True he doesn't have to.

 

Any time you change air or fuel ratio or
Exhaust combustion you SHOULD not have to.
Adjust the computer ( other wise know as the E. C. M. )

 

Lean from MOCO now leaner from exhaust upgrade equals hotter motor. It will run but not optimum.

 

Nope, save your money and go with FL-XiED-10