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Originally Posted by 8-Ball

How would one add a second O2 sensor in the Rinehart true dual headers. It has one on the front cylinder, but not on the rear. Also, does it matter where in the rear header the sensor is installed (i.e., distance from exhaust port).

Thanks.

This whole thing is very interesting.

Call Zippers & talk to Pete. He can tell you the best place for the O2 sensor. Zippers will also sell you the 2nd O2 bung for the installation. Usually all that is required is drilling the hole and welding the bung in place.