From all research I've done, 4th gen headers bolt up to 5th gen systems. Can anyone confirm this? I'm looking at obx for the headers. The 4th gen are 200 cheaper.

 

Only difference is 4th gen have egr port, which can just be blocked off since its not used. Other than that its standard not-perfect fitment since theyre obx

 

So in other words the money saved from buying the 4th gen would be spent on modding the headers. As it stands, besides the bung relocation, I can put the 5th gen's on. Yes I know I have to grind here and there on my baby. Personally this is better than death due to precats. My firewall cat is going bad. The fuel rail voltage trim for the rear is showing -3v... (I hope I'm correct.)

Btw, I'm pairing the headers with srs catback.

 

Well it should be next to free to modify them because all you gotta do is shove a drainplug bolt where the egr tube is, nothing crazy. Other than that its the grinding like you already know about.

 

So the 4th gen require no cutting and welding on the headers?

 

Not that i am aware of, no. Fitment should be the same 95-03, with the aforementioned egr tube for 95-01 being the only difference between 4th/5th gen 3.0L and 5.5 gen 3.5L headers. 3.5L doesnt use an EGR so again you can just plug the sucker up with the proper sized bolt. You gotta grind the crossmember a little bit from what i understand to make obx fit, also i know the motormount bracket on the rear of the motor ‘might’ need a little fckery as well but nothing a dremel or angle grinder cant fix in 5 minutes.

The only (common) headers im aware of that involve cutting and welding are altima 3.5L headers, maybe thats what youre thinking of? The 95-03 maxima headers all link up the same though, ive used my cattmans on both my 4th gens and my current 5.5gen and its the same deal between all of them.

 

Keep the stockers. Much quieter.

 

Would love to, but it's all rotting away. Also my firewall precat is about half clogged, the long term fuel trim is now -3v. Does anyone with more technical knowledge know if I'm correct? So it's A replace with another ticking time bomb or B replace it with something that'll last nearly 3 times longer... I plan on her lasting FOREVER. Picture the chubby kid from sandlot saying forever, forever...

Also I love a mean growl in a car.

 

You know a thought occurred to me... How difficult is it to tig weld up a set of pipes? More to the point, how difficult is it to teach myself tig pipe? I was pretty good with a stick in all positions but never pipe. Haven't really tried...

Anybody recommend a welder from harbor freight? I know 70% of their crap is just that.😂

 

Lesson learned. Keep my mouth shut. Cold, very cold.

 

You can either bore out your precats, removing all of the cat material, or you can buy new precats, or you can buy the headers. Personally Id go for the headers, theyre cheap and youll get a little bit of gains. Doing nothing, as you are already aware, is not an option, youll just kill your motor and that would be that, you are pretty much already going down that road every time you drive if one of your precats is already clogging up.

I have absolutely no idea, on the other hand, how easy it is to tig weld or learn how to, because I simply dont know how to weld. I do know is tig is supposed to pretty much be the hardest to learn, and that harbor freight welding equipment is pretty much the crappiest crap money can buy. Im all for you learning, truthfully i would absolutely love to myself. However, in my case, I just dont have enough reason to learn to offset the significant time/money/effort investment, even though its a skill i would love to have under my belt, it would really only serve my personal satisfaction and nothing else. In your case though, i dont know if you have enough money for good equipment or if youre willing to put in the effort, but I do know you definitely do not have time if you want your car to not die lol, unless your idea of foooorrreeevvvvvvvvvvvvvvverrrrrr is like a couple of month at best.

 

Headers and srs catback will be here next Friday...

 

SRS catback is loud as hell, And if you do 4th gen header then you have to do 4th gen y-pipe. It doesn't line up with your exhaust. And you will have to have o2 bungs welded in. Then use sims to make the o2's work.

Return the stuff buy stock stuff.

 

Krismax. The y pipe is coming with the headers. The O2 issue solved by defoulers. And yes I know to have one relocated... It seems you assumed I was a total noob and just bought parts without doing research.

 

I did this and i am speaking from experience, and i had to add two bungs. And i had a few other problems.

I bought SRS catback put it on and it is way to loud. And drones like mad. Now i am in the process of modifying it .

I wish you the best tell us how it goes

 

What other problems did you come across? And which two did you have to add?

 

O2 sim, screw adding new bungs

 

Yep, get with Slamrod. Help feed a starving college student and have him build you a couple.

 

Besides ease of install, what benefits are there to a sim over real feed sensor feedback? The way I see it the sensors being correctly installed would give you true diagnostics.

 

Speaking of O2 sensors, which aftermarket would people recommend? I also plan on learning romraider to street tune her.

 

And not to deprive ol SlamRod, but aren't they just 555's? Granted with supporting circuitry. If his is board mounted I mite consider them. I can't do a printed circuit with my limited fabrication equipment. Lol

 

I had to order the 5th gen anyways after my little blunder, luckily the vendor cancelled the 4th gen's before I messaged him. The tuner gods must've been looking out for me. Lol

 

https://maxima.org/forums/5th-genera...ulators-2.html

this thread should answer all your questions about using o2 sims, how they work, pros & cons, etc etc. If anything is still fuzzy after reading through it feel free to shoot me a pm.

 

Secondary O2 serve no useful purpose.

I guess OBX can require the rear primary to be relocated. I don't remember, though.