They are nice looking pipes but not called "Loud as Fuck" for no good reason. I realise most on here have noisy, illegal pipes but obnoxiously loud pipes like that will attract the wrong kind of attention immediately. And this kind of wrong attention can unfortunately impact more of us when coppers decide to target more Harleys after they deal with you and your pipes.
Plus you will no back pressure and therefore stuff all throttle response until higher in the rev range.
Nothing in life is illegal until you get caught!!