Will there be a problem with just replacing the slip on mufflers and not adding a new fuel injection module ?
Any feed back would be great ,
Thx .

 

There should not be any problem by just adding slip on mufflers.

 

Thanks Brion on your input !

 

My two cents. I believe there is no issue with just putting on the slip on mufflers. However, any time you change original equipment you will change the way the engine runs (rich versus lean). You really should have your ECM retuned. Your dealer can use a factory preload or buy the screaming eagle super tuner and have your bike dyno'd. If you change the exhaust you might want to change the air cleaner. This is what HD calls its Stage 1 upgrade.

 

ZERO problems with just changing mufflers.

 

No problems changing the mufflers and or cleaner, won't run any leaner than stock.
Some type of tuner or fuel control device will make it run better. But just changing mufflers you are fine.