Having never done a head gasket I dove into it on my car. started up fine and has been holding power ever since. I would however recommend a felt gasket instead of a metal one, the metal gasket is going to require that both the head and deck surface are like a mirror if you want it to seal correctly. I also like the idea that a felt gasket will give way before something else in the rotating assembly does.
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1990 GS-T
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1990 GST
2004 BMW 325i