I recently purchased some megan headers and I guess I want to replace the whole exhuast while I'm at it. My only thing is that I don't know if I get the megan catback will that be it or do I need a y pipe, test pipe or hi flow cat also. Newb ish I know.

Senior Member
first...didnt know Megan made headers for us
two, their headers dont include the y-pipe?
three, does the headers they sell bolt up to the stock ypipe? if so you can get a warpspeed ypipe and be ok
four, GL
two, their headers dont include the y-pipe?
three, does the headers they sell bolt up to the stock ypipe? if so you can get a warpspeed ypipe and be ok
four, GL
OBX headers come with a y-pipe so all you'd need is a catback, no need for a test pipe unless your main cat is clogged.
Senior Member
I'd get a test pipe or a new cat. If you're running a stock cat, chances are it's less than perfect after this many years.
Senior Member
Quote:
Originally Posted by jowo9
I'd get a test pipe or a new cat. If you're running a stock cat, chances are it's less than perfect after this many years.

Quote:
This is irreverent. 02+ Maximas do not have an O2 sensor behind the main cat/test pipe.Originally Posted by luvlexus101
get the test pipe anyway and an o2 sim
Senior Member
Quote:
Originally Posted by Sneaky Green
I really don't have anyone to do the o2 sim mod for me here so how much hp does a high flow cat average
Quote:
Actually, he will need the o2 Sim mods for the headers he is installing at the same time. Lack of precats will require them.Originally Posted by NmexMAX
This is irreverent. 02+ Maximas do not have an O2 sensor behind the main cat/test pipe.
Quote:
You missed my point of my originally quoted reply that it is not needed if all you're doing is adding a test pipe. Originally Posted by TallTom
Actually, he will need the o2 Sim mods for the headers he is installing at the same time. Lack of precats will require them.
And seriously, you think I don't know that?

Senior Member
Quote:
And seriously, you think I don't know that?
Luvlexus101 said to get o2 sims and a test pipe to add to the header install. The original poster probably doesn't know that he needs o2 sims for the headers. Originally Posted by NmexMAX
You missed my point of my originally quoted reply that it is not needed if all you're doing is adding a test pipe. And seriously, you think I don't know that?

Ahh, I gotchya now.
I still struggle with this, maybe it's just my car, but my secondaries are plugged in to my primary ports, and there are no secondary SES's on my car.
Myself and 03BLK's secondary O2's have both never complained about not having pre-cats in place.
I still struggle with this, maybe it's just my car, but my secondaries are plugged in to my primary ports, and there are no secondary SES's on my car.
Myself and 03BLK's secondary O2's have both never complained about not having pre-cats in place.
Senior Member
Quote:
I still struggle with this, maybe it's just my car, but my secondaries are plugged in to my primary ports, and there are no secondary SES's on my car.
Myself and 03BLK's secondary O2's have both never complained about not having pre-cats in place.
Originally Posted by NmexMAX
Ahh, I gotchya now. I still struggle with this, maybe it's just my car, but my secondaries are plugged in to my primary ports, and there are no secondary SES's on my car.
Myself and 03BLK's secondary O2's have both never complained about not having pre-cats in place.
what are you hp numbers NmexMax?
Quote:
Before the 3" Catback and spacers:Originally Posted by 2kmaxseblack2k
what are you hp numbers NmexMax?
http://forums.maxima.org/dyno-discus...242-238-a.html
I have enough for cattman 3" catback when I get my taxes along with a test pipe, obx headers and o2 sim my exhaust will be done for now correct