[liltanker22]

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??

 

[metro273]

The catalytic convertor?

 

[liltanker22]

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.

 

[Mr.Nissan]

take a pic of it, and show it.

 

[Asleep]

its the pre-cat.