stock head pipe?

[xr600]

I have a FMF pipe but dont know if my head pipe is stock or not.How can I tell?thanks

 

[yamarider]

Posting a pic of it will be the easiest way to know for sure what you have.

Without that though, the stock header will be black painted steel, with welded on mounts for the heat shield. Most aftermarket headers are stainless or chrome, and most don't have heat shields.

 

[xr600]

Looks to be stock has two holes for heat shield but shield is gone.