Ok, checked everything over, re-tightned all exhaust nuts.
I bought a code reader from harbor freight for $39.99 (so I don't have to borrow my friends all the time) and cleared my check engine light. Drove around all weekend and (knock on wood) it has stayed off. We will have to see what happens, but I am hoping this fixes it!
I am pretty sure the solder in MILS are working correctly, I think I was just getting out of the range that they correct for. Probably because of an exhaust leak or something.
I did notice the driver's side header to downpipe bolts were kindof loose. It has moved downward also. I think after hitting the transmission crossmember it "self-adjusted" itself.
I am still dissapointed with the build quality of the MAC H-pipe, it sounds great, but the fitment sucks big time. I emailed them with my concerns, but of course never got a reply. Not even a thank you, sorry, or FU.
Thanks all for your help!
Scott