RobMan, take a good read of the DIY for HFCs, saved me bunches of frustration (thanks to you guys for writing the DIYs). Lots of liquid wrench on the "devil bolt". I was doing CAI at the same time which made it easier to reach the top front cat bolt on both sides with the long socket extension 1/2 or bigger! Also needed to buy a 22mm open end wrench for the o2 sensors. Biggest I had was 19mm and a crescent just didn't seem wise. Promise it will be a pain in the a** but so worth it once done! Good luck.
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