New Pipe for a 426

My son has a WB R4 on his 01' 426 now and i would like to get a pipe that would quiet down the gigantic roar that it gives out now. Any suggestions on pipes that give a pretty decent amount of power but can bring the noise tone down a bit? Thanks for the help. :thumbsup:

FMF Q series is the quietest pipe I have heard on the 4xx bikes.

I have a ProMeg E series and that is quiet. Also adjustable.

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