2008 M109R, 2016 FJR1300, 1999 VMax, 2009 Suzuki AN400 Burgman
That's old school. I put a bolt with a washer welded to the end through the bottom of the pipes on my stock exhaust after a partial gut back in 2008. Nuts inside & out. The washers could be rotated 90 degrees to change the back pressure. Guys have done this forever to (try to) tweak their exhaust.Freedom Performance Swept makes a 'quiet baffle' but they're hard to get...while I'm waiting I bolted an 'inside pipe JUST inside the tip of the top exhaust pipe that restricts the exhaust a weeee bit. It INCREASED the (3000 to 5000 rpm mid-range power and DECREASED the noise...I know it's a backyard way of doing things but it works...PEACE RIDE SAFE.