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Bosch O2 sensor for rear section by cat
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Last edited by hytek369; Jul 19, 2008 at 05:11 PM.
for clarification - this o2 sensor comes with 4 wires. Evo 9 has 4 wires. you need to cut the factory wires and connect them with this o2 sensor. it is super easy. you dont need to solder. the o2 sensor comes with quick connectors (they are like butt connectors). it literally takes 5 min.



