dthomas22 Posted July 23, 2012 Share Posted July 23, 2012 I just bought a 90 prelude si with a b21a1. There is some sort of valve or somethin in the middle between the 4 spark plugs that is blowing out hot air. I cant seem to find anything about what it is. In every pic i look at there is some sort of cap on where the valve or whatever it is. Can you guys help me out so i can figure out what it is and replace the missing part. thanks Link to comment Share on other sites More sharing options...
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