Okay, this could have taken all day, so I'll except any **** you want to blow me about the end results. After about 40 mins I was honestly bored with it.
What I used:
Heavy duty industrial grade degreaser
Heavy duty scrubber pad
I would have to remove things to really get a good cleaning on it, but the intake manifold looks 100x better now. It was a VERY dark gray before I started, now it looks like it's metal :lol: The before pictures would have been better if the sun would have been behind the clouds. I'm satisfied with the results for 40 mins worth of work.