I thought all pipes blued? Some of the bikes have a clamp on chrome shield to hide the blued pipe underneath. I never minded the bluing. I preferred it to the melted plastic after I hit the black plastic bag which be came "fused for life" to the pipes on a Honda I had. 
OM
OM
so I cleaned them up using "Blue Away" and some steel wool they look pretty good now but when they start to blue again hopefully it will be more even between sides.
