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i recently upgraded my exhaust to a 4in cat back system and a hi flow cat. anyway there are two cables running under the car and connect to the stock cat. does anyone know what these cables are for. because the new hi flow cat has no hole for one of the cables to connect to.. i think the cable is for exhaust temps..

sort of looks like a cable with a spark plug connected to the stock cat?? anyone know if its important..if you need to have it on?

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My Bad..What was i thinking...Sorry for the confusion guys, Im not all there today...HEY ITS A FRIDAY!

You CAN live without it, but if your CAT gets blocked, the only way you'll know is when you cant breath cuase the fumes will intoxicate your car.....This happend to a supra we just picked up from the docks 3 weeks ago, i nearly threw up in the damn car. I would Strongly reccommend this be plugged in, Also, if your CAT gets blocked, your Gas/Temp sensor will realise there is not an even flow of air/fumes going through the exhaust and your ecu will switch your Engine warning llight on to tell you theres a problem.

Its there for a reason, So USE IT....

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