Most everyone uses aftermarket exhaust pipes, so, what is the noise level your bike is putting out? I believe the BLM say it can not exceed 96 DBA.

Are they hard nosed about it?

 

I have a ModQuad end cap which excedes the 96db level for sure. I have not run into any problems where I have gone ...Yet. It would depend on where you ride. I try to keep the RPMs down in and near the camp areas trying not to draw attention to myself. In the dunes it's a whole different ballgame, you can here me comming for quite a ways out..lol..