Hi I have a 2012 Road King, stock except for Screamin Eagle mufflers, am considering fitting a set of V&H Headers, will I need to tune it, if so could someone please tell me why. She has the stock air filter and will have the O2 sensors fitted to the new headers. If I dont tune it after, what issues would I expect to encounter, thanks for looking at my question.

 

Regards Rosscoe.

Thanks mate for the reply and why, much appreciated, so what is the best........ sorry mate just kidding that would open up a whole new can of worms, with the mine is bigger/better than yours. Will do some research of my own to work that one out, thank you again for the info.

Cheers
Rosscoe.

Rosscoe, mate the cheapest and best performance improvement you'll get is chanhing stock air filter for a K&N filter or simmilar and a tune. Highly recommend it!

Absolutely, catalytic converter working against you, plus the heat!