UPDATE 3:
Managed to get my oil and oil filter changed after getting back from No Discount Tires. Also was able to put the Torque Solution drive shaft bushings back on. I could not manage to undo the bolts holding the cat to my catback. I blasted them with WD-40 and even busted out my dad's torque wrench to get more leverage and nothing. I ended up giving up as it was 6pm and parents were starving.
I realize now that I probably should have done the cat first when the bolts were still hot/warm instead of doing the oil and bushings. Lesson learned!
I'm heading over to Kracka's early tomorrow morning (well...trying to be there before 730 if possible...which for me is a hard thing to do, lol) to try and do the cat/test pipe swap before heading out to Cobb for the dyno day. Hopefully all goes well and we can get the pipe swapped so I can flash to Cobb's OTS Stage 2 for the dyno day.
For those who might be wondering, I really want to dyno the car with Cobb's OTS Stage 2 map because my mods have stayed the same from my Stage 1 OTS dyno pull until now. Swapping out the test pipe will allow me to run OTS Stage 2. So it will give me a good comparison of how well Cobb's OTS Stage 1 and Stage 2 maps compare. I'm currently on a Stage 1 protune from Cobb and making 317whp/322wtq. I made 305hp/291tq on their Stage 1 OTS. I'm guessing that with Stage 2 OTS, I'll probably be around the same hp/tq that I'm currently running. I plan to go back in a few weeks for a retune with a Grimmspeed 3port and a Synchronic BOV. Goal is to be a 330whp daily driver. After that, the car will be donezo!