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Discussion Starter #1
95 nissan altima gxe...the headers go down into a big round cylinder look do joby... i am going to replace my exhaust and headers but have no idea what that thing is or i need to replace it. never seen anything like that before... what the heck is it??
 

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Discussion Starter #3
nope not it..where the headers come out of the block about a foot down is a huge round cylinder... the o2 sensor is there and also a vaccum line from there that wraps around into the back of the engine... not a converter.
 
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