I can't say my install went any better than macdaddy. After figthing with the OEM flange at the 2nd cat, the removal was not bad. After reading these threads, I removed the 2 fans and installed from underneath and it went in ok. EGR was not tested, as it was about 1/2inch too short (front to bad of car) and had to cut the egr line and install a coupling (just added enough with a coupling). Then tightened everything up, and OOPPS, forgot to install the 2nd o2 sensor. Ok, just put it on right? NOPE, could not screw it in, as it hit the oilpan. DAMMMMMMMMMMMM. Removed the header, put the sensor in, and reinstalled. JUST, JUST managed to fit, but O2 touches the oilpan.
Basically the header works good, but has fitment issues. EGR is off, and o2 sensor was also not in correct position. This shows you that some quality control is needed at awr. THEY DO NOT FIT TEST.
Any comments or concerns from others who installed about heat issues. It sure seems to put a lot more heat into the engine.