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Old 05-18-2014, 09:33 AM   #4 (permalink)
serialk11r
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Join Date: Jan 2012
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spyder2 - '00 Toyota MR2 Spyder
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I am fairly sure the O2 sensors at the exhaust manifold always turn white from the heat, mine were that color when I took them out for replacement. Downstream after the main cat, it was black from soot.
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