On 4th gen nissan maximas, ther are one with a 02 sensor behind the cat and some with out. I just got my Y-pipe from budget and i am was going to get it installed on monday, at the same time though, i know there is an 02 sensor behind the cat and i dont know whether thats going to restrict air flow. Can some please show me the underneath of the carriage esp between the B-pipe and the cat. I look d at : this link and it shows some differences but i want to know if there is something that i an use to put a high flow piece there.

 

from what ive heard, the budget b replaces that section with the sensor and has a hole that can be plugged if you dont need it, but thats just what ive heard

 

Is it all aftermarket b's that replace that pipe or no? I can't recall.

 

95-95 are in cat...97-99 after cat if that helps

 

The courtesy B- does have that peice. Actually they give the piece to all maxs do not havethem because they only make one B-pipe and that fits the 97-99 maximas with that little piece. I just want to remove it. i looked at it today and it looked very restrictive. Thats just my 2cents.