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BostonEvo · Jul 8, 2009, 11:19 PM

This is probably the noobest Question ill ever ask. But i bought the car with a Aftermarket Exhaust on the car.

I got a stock Catback off a 2003 , And a picked up a stock Cat. Now my question is.... Where the hell is the rear o2 supposed to go , i know its supposed to go after the cat. But there is no bung in the catback so im dead confused. ill just end up welding a bung in for the o2 sensor. But id still be nice to know where its supposed to go on a stock evo. ( My car is a 2005 , i dont believe that would make a diffrence on a catback. )

I swear i saw some pictures of the o2 Sensor IN the cat.

Jul 8, 2009, 11:19 PM	#1
BostonEvo Evolving Member Personal Sales Rating: (15) Join Date: May 2007 Location: Boston Posts: 205 Drives: 2005 Evo GSR w/ SSL	Stock Rear o2 Sensor. WHERE DOES IT GO This is probably the noobest Question ill ever ask. But i bought the car with a Aftermarket Exhaust on the car. I got a stock Catback off a 2003 , And a picked up a stock Cat. Now my question is.... Where the hell is the rear o2 supposed to go , i know its supposed to go after the cat. But there is no bung in the catback so im dead confused. ill just end up welding a bung in for the o2 sensor. But id still be nice to know where its supposed to go on a stock evo. ( My car is a 2005 , i dont believe that would make a diffrence on a catback. ) I swear i saw some pictures of the o2 Sensor IN the cat. __________________ Evo 9 Turbo ,JIC manifold ,QTP 3inch DP w/ Cutout , Comp 280 cams ,Fidanza cam gears , ETS Lower IC pipe , Perrin FMIC , Halman MBC ,AEM Intake ,Megan o2 housing ,AMS 880cc injectors ,255 Pump , ACT flywheel/clutch ,Agency Power Short Shifter ,Inovative Wideband.
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