Vance & Hines Header

I have purchased a Vance & Hines v13001P header and I'm being told I need to find some exhaust port torque cones to install this header. Can any one help or point me in the right direction.

Thanks
Craig

Not sure what those are. The instructions say nothing about them.

cdn.vanceandhines.com/download/K105IN.pdf

Ok. I went trolling the net a bit and found out what they are, but it seems that they mostly appeal to the HD crowd.
Have you ever ridden a bike with an open drag pipe before? It will be VERY loud, and there is very little cornering clearance on right turns.

Yeah right, whoever told you that is an idiot.