R100 Posted July 15, 2013 Share Posted July 15, 2013 I have removed the factory cast iron headers on my 2jzge and fitted custom made extractors. The factory exhaust manifold was split into 2 pairs of 3 into 1 cast manifolds, each with an oxy sensor. My questions is, do I need to refit both of them or can I just fit one or do I need to bother fitting them at all. Quote Link to comment Share on other sites More sharing options...
Rookie Posted July 15, 2013 Share Posted July 15, 2013 If your inlet manifold is symetrical enough then one should be fine. Quote Link to comment Share on other sites More sharing options...
R100 Posted July 15, 2013 Author Share Posted July 15, 2013 It's a 6 into 1 system. Quote Link to comment Share on other sites More sharing options...
Borgweiser Posted July 15, 2013 Share Posted July 15, 2013 One should be fine, did it have a third one further downstream? How many wires to each O2 sensor? You would have to give a signal back to the ECU via both plugs so splicing together may be an option Quote Link to comment Share on other sites More sharing options...
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