What exhaust are you running on your 2006 WR450F?

Hey guys in running a DG R series pipe on my 450, I'm jetted with all free mods done. It runs awesome, could ask for better, BUT that pipe is loud and I had some issues with law enforcement last year so I am looking at the quiet core inserts DG offers.. Has anyone used any of these, what size and do they restrict too much? Any advice of experience with these pipes?

I have the GYTR... its good sound not super loud.

I have the GYTR... its good sound not super loud.

This.

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