Just some feedback on my experience after fitting a Pro Circuit Platinum 2 with 302 stainless silencer to KDX 200 .
Only mod I had done before was the airbox lid removal .

I tested my bike in a drag against my mate who was always slightly quicker in a drag . With the new pipe he doesnt even stand a chance . I would estimate probably about a 20% increase in power over stock .

I am very impressed and definitly worth the money spent .

Now im concerned about my back tire as it is battling to find traction .

Also with the extra power it is so much easier to keep the front wheel up in wheelies .

My KDX came with the PC. PC in essence designs most of its pipes in one version, serving to offer a slight increase everywhere, not strongly focusing on one portion of the power band at the exspense of another like FMF.

The Pro Circuit definitly has a bigger increase in the top range compared to low and mid range .
Before buying I spoke to a couple of guys and most recommended the PC over the FMF .

I got better throttle response with the V-force lll, coupled with the PC pipe it's a nice combo. There's definitely gains spread out, but most noticable up top. Along with proper jetting, there's no comparison to stock. I've yet to do the carb mod because I don't feel like I'm missing anything from the bike yet...yet.

The next and last mod I will do is reeds and if I then want more power I will look at a KX 250 2 stroke allthough I would want to keep the KDX if possible as a buddy bike .