i put vance & hines 450 destroyer slip on on my '15 sg didn't do head or fuel pak yet but intend to soon.they said its recommended but not a "have to" .....am i damaging my motor? i know its more air and same factory fuel setting! thoughts guys, thanks
If you are still running your factory catted head pipe, and factory air cleaner. And all you put on was pipes, you should be good. Now if you changed out head pipes or air cleaner, your probably running too lean.
