So I recently bought an 11' street glide with the 103ci motor. It had Rinehart true duals on it, screaming eagle intake, and a tune of some sort. I never ended up getting the physical tuner from the guy i bought the bike from. I want to put a Thunderheader 2-1 on the bike, but will i have to buy another tuner, or will the set up i have with the True Duals work just as well with the Thunder Header? Thanks in advance for any help!

 

You will need to get a tuner or have the bike Dynoed. Either way you will need a tuner
There are many different tuners out there like power vision,tts mastertune to name a few. Keep in mind any future mods you might to and buy the right tuner the first time

 

Rsking45 - it has a tuner in it at the moment. I just don't have the physical tuber itself to retune it per say with the thunderheader. My questions is do you think it will run alright with the tune I have now for the Rinehart true duals or will I need a new tune with the thunderheader. Thanks

 

Try it, you're probably not going to hurt anything by riding it, both those aftermarket pipes are good quality and allow a decent amount of airflow so you're not going to change all that much.

If you can put them on yourself, put them on and try and see if you notice a difference.

Having said that, it'll run BETTER if you buy another tuner and retune it.