Does anybody have this pipe or have any information on how loud it is or what kind of performance gains you get??? I would appreciate any information..

 

Nope. But I do have a FMF Powercore IV and it is louder than I like. My buddy has the White Bros. Serie e and it is even louder. I am going to get rid of my pipe and am going to try the new Stroker SX-1 (with spark arrestor). You can get a Quiet Tip for an extra $40, that is removable (for racing) and only costs $40 more . I think it would be like having two pipes. Their website is www.strokerspeed.com. Ride On.

 

get the pro circuit it has been around for a while with the dirtbikes they are sweet pipes

 

At a local dealer, there is a 2000 300EX setting on the showroom floor with a Prociruit pipe on it(also: cam, piston, porting, head-pipe, holeshots).
A salesman started it up for me, and I have to say that it is the coolest sounding quad that I have ever heard. Deep and growly, like it's ready too rip it up.
I would imagine on a 400, that the sound would be even deeper.

I didn't get a chance to ride the machine, so I don't know about power gains. But the sound is unreal.

Chris 00' 300EX