I don't have anyway to measure flow from the pipe. I thought I'd try it one day just because. The bike already had all the low end anyone would ever want so I thought I'd add disks and see what it does. It didn't take away any of the bottem end and I could notice a slight increase in top end so I stayed with it. It's a touch louder than with the 12 disks and It will flow more exhaust like with the open end cap. Without a way to measure the flow I couldn't say how close it is to an open end cap. Plus adding the disks keeps the spark arrestor in tact while adding flow. [img]i/expressions/face-icon-small-smile.gif[/img]

 

Thanks he ordered the open end cap so we will try to dial it in that way