Home › Forums › Gen III / Gen IV › Belanger header and exhaust question?? o2 extensions??

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    • Shannon Whitehead
      Keymaster
      June 8, 2014 at 5:00 am
      Post count: 274799
      #109013

      You won’t need the rear pair of O2 sensors. Just plug that hole, and turn them off via SCT tuning. Only the front pair, installed in the headers, is needed for a custom tune. The secondary pair of O2 sensors is just used to test catalytic efficiency, not for engine performance/tune. If you have not cats, no need for 2nd set of O2’s.

    • Shannon Whitehead
      Keymaster
      June 8, 2014 at 5:38 am
      Post count: 274799
      #109016

      Nine Ball said:
      You won't need the rear pair of O2 sensors. Just plug that hole, and turn them off via SCT tuning. Only the front pair, installed in the headers, is needed for a custom tune. The secondary pair of O2 sensors is just used to test catalytic efficiency, not for engine performance/tune. If you have not cats, no need for 2nd set of O2's.

      Awesome that is what I thought! So with that said no need for the o2 extensions either. As the upstream should reach just fine, correct?

    • Shannon Whitehead
      Keymaster
      June 11, 2025 at 2:09 am
      Post count: 274799
      #13843

      Hey,

      I have purchased a set of Belanger headers used and catless belanger side pipes for my 06 Viper coupe. Will I need o2 extensions at all? Plan on just having the rear o2 turn off in the tune and just cap the bungs if there is any with a catless setup.

      I also plan to buy new mopar steel exhaust gaskets and ARP bolts for the install. Just need to know if I will need extensions for the front o2 at all?

      Thanks for the help!

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