Torque solutions exhaust hangers should fix the issue. Will keep the exhaust from moving around too much. I have had this issue a couple times but only on bad bumpy roads or even railroad tracks cause the exhaust just moves too much with the stock hangers

 

Here's the contact point

 

I had a little problem with it falling off the back hanger, but not up towards engine. Do you have stock downpipe? I think if I didn't have motor mounts mine would hit. My setup doesn't have a flex section, so if my engine moves, whole exhaust moves with it.

 

Stock downpipe yeah

 

Are you sure the cat back is installed correctly? The connection at the cat has a bend, you need to orient it correctly to clear. You can spin it 120 degrees if needed.

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Yep, if you look at the photo you can see I have it properly oriented with the downward bend.

 

No the exhaust does not come with a flex joint ?, you're right though that motor mount does actually look like an easy replacement. If the torque solution exhaust hangers dont work then I'll probably move to this next.

 

I had this same issue. Use an air hammer or any hammer to make clearance (you cant baby your swings or go easy on the hammer). Beat the beam above the pipe. I had to do this with the FullRace 3" cat-less down pipe and cat-back. I installed the torque solution exhaust hangers as well.

 

Late to the partay here! The issue, as I'm sure you know, is that there is *very* little room to spare with a 3" exhaust system. Another solution other than just going to different exhaust hanger bushings (which is a good solution) is to use pipe clamps around the stock bushings. Tighten them enough to get things in position while still leaving some room for movement. You may need to put zip ties around the bushing the other direction to hold the clamps on; get creative... Also, I didn't see it stated, but if you haven't, a stiffer rear motor mount is pretty much a necessity for a larger exhaust otherwise the engine is going to move too much. . .