2003 wr450 exhaust question

I have a 03 wr450 w/ power bomb header and the original muffler w/ pmb insert. It runs much better w/out the insert but is way too loud. I ride through residential areas to get to the trails so it needs to be reasonably quiet. Is the fmf q4 worth the extra coin power wise? is is any lighter? Any idea how many db the stock pipe is? Thank you in advance for your endless knowledge

The stock WR pipe has no packing, so it's a different sound than anything else. Also more annoying than anything else, IMO. I've been running a YZ pipe w/ DRD endcap and quiet insert for a while now. Anything is better than the WR pipe, but most are so expensive. I'd rather spend my money on cams.

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