250-500cc What pipes are people running on there 2t?

Hey I have a 2013 wr300, wanting to get a new pipe and muffler for it, what are people running and do they make much of a difference?
I have looked and can only really see FMF or pro circut.
I have fitted a force bashplate/pipe guard in one, and I took my bike down to get a pro circut but apparently the pipe won't fit with the guard, so is it worth scraping the guard for the pipe?

Stock pipe and FMf turbine core 2. A bit quieter than stock, actually repackable, looks good, no performance difference.

stock pipe with Leo Vince. I have stock also, but can't tell about difference. one thing I dont like about LV is that spark arrestor is a metal screen and you can't put a water plug in the pipe when screen is installed.

stock / stock on my 09 wr250
stock / fmf TCII on my '14 cr144

Has anybody run the Q-stealth? If so, how much quieter than stock is it, really?

I am currently running a FMF gnarly pipe and stock silencer. Gnarly makes a bit more power but doesn't seem astronomical. You can repack the stock silencer, just need to drill some rivets and it's a bit of a pain to reassemble.

I have the gnarly pipe and power core 2 muffler and love it. I noticed a big difference in bottom end

I lost interest pretty quickly. Bought a stock pipe and silencer on eBay for $65 delivered last winter. Sold the two silencers for $40 each on eBay so my TC2 cost me about $40. Another frivolous investment for simplicity. Will say it don't match up with stock pipe WRT pipe sealing. Used RTV with OEM grommet and it's all sealed now. I have had Q Stealth on other bikes. Yes, it does make them a bit quieter but nothing like say a stock KDX200 noise wise.

Same.

I run the Gnarly/Q-stealth set up on my 09 300. It's definatly quieter. At D36 events with the stock silencer I was always in the 95~96 db range, now its 93~94 db.

Bought my 09 wr250 used. Has a DEP pipe and Leo Vince silencer. Also came with a Fatty but I haven't tried it yet.

I've got the Gnarly/Q-Stealth also and the Gnarly made a significant difference down low. Way more torque but I think you give up a little top end. Doesn't rev as
high as the stock. If the Q Stealth is quieter than stock it's not by much. It doesn't sound that much different to my ear but I'm just going off memory so...I like it a lot, though.

All stock on a '14 WR300 for me - I can't ride the bike to it's full potential anyway, and noise isn't a concern, so a pipe isn't going to make any difference to me. I'd rather just put the dollars I'd spend on a pipe or muffler in more fuel and 2 stroke oil and ride it more!

Unrelated to this topic, but I did front the coin on a Lectron... now that was a very good investment!

Currently running a FMF Gnarly with Turbo Core silencer. More bottom end power than the Doma I just smashed. The FMF is made out of much heavier metal also. Bike came with a 2C pipe that I need to send out for repair. I have never ran that pipe. From what I have read I think the Doma is a great all around pipe that sounds awesome. Not sure where to get one anymore though.

I have a Gnarly on both 360's
a Turbine Core on one and a Turbine Core II on the other
the oem pipe was OK but very heavy, oddly the pipe itself was quieter than the Gnarly but the silencer sparky was a big difference
yes it has more bottom end as stated above but I don't think it really sacrificed much on top
the Turbine Core and II silencer sparky is a huge difference in sound, not so much in decibels but a much more pleasing sound

'08 WR250 with Stock expansion chamber and FMF Turbine Core II. Smooth bottom & Mid with nice torque.

Any body tried the factory "racing pipe" made by Pro Circuit?

running a dynoport big volume pipe...seemed to boost overall power but really made the top rip...

im running the dynoport spark arrestor model silencer with it...fairly quiet for a big bore. i think the volume is about perfect...the airbox note is probably louder till you get higher in the band then the exhaust takes over

I have one of these to install on mine and it is tempting from what you wrote