Quote: Napa did this manifold and it came out looking like new
Are you sure it was tanked? Looks more like cooked and shot beaded.
No a real castic hot tank will make them look like new, even eat the rust off. I used to use one quite a bit.
Most imoportant thing to remember on sb is to grind off the rivets holding the cover on the bottem of a stock intake to get it clean and clean the plate separately in the hot tank.
