Turns out, for whatever reason, SLP recommends pulling the studs from the driver's side exhaust manifold in order to install the x-pipe with bolts. Despite my best judgement, I figured I would do the project the 'right' way and follow the manufactures instructions.
Well, that got me this:
IMG_4100 by emanookian, on Flickr
Yes, that is a severely broken stud in the exhaust manifold. Despite the way the photo looks, it is really not a feasible option to drill it out when the car is on jackstands.
So then, that led to this:
IMG_4117 by emanookian, on Flickr
And if you know anything about Modular Fords, you know that exhaust manifolds coming off the car, with the OEM k-member in place are an absolute bitch. Luckily, for the New Edge Mustang, the driver's side manifold is easier to get to than the passenger. So this came off without too much drama.
Small but valuable tip for working on exhaust manifolds to avoid broken studs - dont remove exhaust fasteners as you go. Break torque, turn them loose and then snug them back up. Do this until every bolt or nut has been loosened and re-snugged. This prevents the manifold from flexing as the fasteners are removed and putting alot of pressure on the remaining fasteners - making them much more likely to break. You know how everyone complains that the last stud or bolt was the one that broke? Well, this is why.
Anyway, on the bench, it proved futile to drill out the remnants of the stud - mostly because I center punched poorly and the hole I drilled into the remnants of the stud was off center. So I ended up boring out the manifold hole kinda like this:
IMG_4126 by emanookian, on Flickr
So I still had to installed the SLP X pipe with the M8 x 1.25 mm bolts - however, I now had nearly an M10 hole in the exhaust manifold. Desperate for a solution, I was able to use my nearly non-existent welding skills to barely stick and M8 x 1.25 nut at the back end of the exhaust manifold.
IMG_4130 by emanookian, on Flickr
This allowed me to utilize an M8 x 1.25 bolt as the SLP instructions intended to get the SLP X Pipe piping on:
IMG_4127 by emanookian, on Flickr
Ultimately, once the exhaust manifold was back on, the rest of the install went super smooth:
IMG_4139 by emanookian, on Flickr
IMG_4136 by emanookian, on Flickr
A now, finally, my full exhaust from end to end can be bolts on to the car, clearing all my rear suspension components (in some cases with fractions of a millimeter to spare). And I have tailpipes again!
IMG_4132 by emanookian, on Flickr