header back - not that I have found. Manifold (center dump) back = yes (but in 2.25")
I have used the Heartthrob Exhaust kit on several of my blazers with no issue.
Install Pix -
http://www.heartthrobexhaust.com/4159M.html
Install Instructions Link
They have both steel and stainless -
Heartthrob Exhaust Page
Last time I bought one it was ~$550 shipped or so a few years back.