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anson carr

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Everything posted by anson carr

  1. Ok thank you for your reply.
  2. Hi I have a 2003 Gmc 2500hd with a 6.0 gas engine. I put long tube headers on it and flow masters and took off the cats. The headers don't have holes for the o2 sensors. Do I need the o2 sensors or can I run it without them?
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