[special-K]

Motor mounts are the first thing that comes to mind. Header manufacturers know that the cylinder heads are offset and make the headers to end evenly. I buy the brand and model I want and wouldn't want Magnaflow telling me what headers to use. I always wondered how anyone could make a bolt-on exhaust system to fit any manifold/header. That's why I still have custom exhaust made. I think the benefits of mandrel bent are never realized in most applications,but if I had to have that I'd pay more and have a custom mandrel bent system done. If you come up with no other solution,you could always have an x-pipe made to work or modify the out of box one.