Will the Stock Moto exhaust fit and work on the Speed? This exhaust sounds killer and it must increase HP. Any help would be appreciated.

 

Yep,but you need the full system.

 

Or you could go to the aftermarket and get the same thing cheaper, but will work with your stock header pipe (round exhaust).

The stock Moto pipe is an FMF Titanium4.

If you can come up with a Moto Silencer, that can be made to work with the stock Speed pipe with FMF's connector pipe.