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Old 10-08-2011, 09:22 PM   #19 (permalink)
msr635
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Join Date: Aug 2008
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The only one of those I have is on the car. I think there may be some aftermarket exhausts that go all the way to the cat. You have to have the cat to keep the O2 sensor hot. I was going to eliminate the cat until I figured that out.
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