The stainless back box is also included but has been welded in the past ( badly) where the pipe joins the box and broke off when I was removing it from the car. I've cleaned it up with a wire brush to show the break.
The back box is repaireable and needs welding properly and is included with the other parts but the value is really in the headers and mid section. A standard 1st gen back box will bolt straight up to this system.





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