[QUOTE="The easy solution is to run down to your local exhaust shop and have them add a couple inches to each side of the exhaust between the cats and the crossover. Don't use the crap exhaust spacers the lift companies like to sell. Aside from potential exhaust leaks, they also cause the crossover to drop down, which reduces ground clearance and interferes with some aftermarket skid plates. Also, they really are no cheaper than getting it done right at an exhaust shop.[/QUOTE]

I'll be going to an exhaust shop to get them to weld me a flowmaster hushpower behind the resonator on my 2012 jku, then remove the stock muffler and have it dump right at that OEM clamp. Do you think I would have any issues with the front driveshaft or the Evap if I also extend that pipe at the front driveshaft?

 

I'd think the shop could avoid the EVAP regardless of what you do. Regarding driveshaft clearance, there are two obvious spots on the pipe running after the cats where they can be cut and extended 2". It is the same solution as a spacer except that it lets you choose the point at which you cut the pipe. You want to cut where the pipe is not sloping downward. That way, you move the crossover back, but not down. Have them move it back as far as possible while leaving maybe 1/4" of clearance between the pipe and the trans crossmember.