I just bought the Magnaflow #94035 catalytic converter for my 04 sunfire....went to the muffler shop and the guy said i was missing something on it, and he pointed at the o2 sensor hole ? Is it a bung? If so where can i get one and what size ??
When i bought my Magnaflow it came ready to install
Im not sure of the model number of mine but i know most people just buy theirs and get them installed without issue.
i ordered mine from never enough auto accessories, and it had the bung pre-installed as well ready to go....make sure it's the right one, or you could just have a bung welded in for the sensor....but i'm pretty sure that is the number....if someone wants to back me up on that.

"If you have no clue what's going on... STFU!"
if you have a bung (threaded hole) on your new cat for the O2 sensor, then take it to another shop that knows what they're doing. Many ppl have used that cat with these cars.
That hole is where your rear O2 sensor goes. Maybe he was thinking it needs a plug? @!#$ idiot.
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- Sold my beloved J in April 2010 -
Viper98912 wrote:That hole is where your rear O2 sensor goes. Maybe he was thinking it needs a plug? @!#$ idiot.
I think he's saying there was no hole???? But if there is a hole... tell your muffler place to close up shop because he's lost!

"If you have no clue what's going on... STFU!"
post a picture of your cat so we can tell if that guy is a moron lol

12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]