I see a few different variations of Nyrocs muffler mod(more or less bigger or smaller holes).Any insight to what combo works the best?Gonna do it tonight and probably that freq modulater NovaKaw is talkin bout soon,so Ill want a little more flow.Any input is appreciated.

 

6 3/8 holes is not very loud (like a griz) with a smaller power improvement, 7 1/2 holes is louder with more performance.

Take your pick, or try 32 1/8 holes and see what that does. Just kidding.

I like to tell people to stick with 6 holes so the center one can't be probed by a ranger.

Take the baffle out of the tip.

 

I went with 12 1/2 inch holes sounds like a Harley!!!!!!!!!!