Another OBX header Question..

mrood1986 · 10-13-2009, 11:08 AM

Alright so I have been doing a lot of research on the forum and through google but cant find my answer exactly. Sorry if its posted somewhere, which it most likely is but I don't want to purchase the wrong headers.

Want to purchase headers and y pipe for my 2000 Maxima SE

3.5
http://cgi.ebay.com/ebaymotors/OBX-H...ht_2502wt_1167

3.0
http://cgi.ebay.com/ebaymotors/OBX-E...item518d35f81c

I have read that my car has an EGR because it is a 00 compared to the 02-03 where they do not. Will the 3.5's fit my 3.0 engine?

Thanks

Again sorry if this is posted somewhere

mist max2000 · 10-13-2009, 12:24 PM

bottom line.. the manifold part of the header will bolt up so yes they ''fit'',.. but if you have an EGR, which you do,.. you will need headers with an EGR port, thus the 3.5 ones are worthless to you.. UNLESS you have someone add an EGR bung... those 3.0 ones are def different then the 3.5 ones.. i wouldnt expect the same performance gains.. and they should sound a heck of alot different,..both being due to the unequal length Y pipe...
..maybe it will sound like an STI

(not serious)

why OBX didnt produce just the 3.5 version and have an egr bung on all of them,..and have all of them come with the egr capped off is beyond me,.. prob coulda saved a crap load of money on not only production but costs all the way around and it would open their clientel base for one product from 95-03 maximas.. ..meh

mrood1986 · 10-13-2009, 12:29 PM

sorry if this sounds like a dumb question but what will happen if I dont connect the EGR? Will I just have a check engine because of the EGR not being connected?

*hectorc* · 10-13-2009, 12:31 PM

Correct...check engine light will pop up. In Illinois you don't want to deal with that...unless you live outside of Cook County.

mrood1986 · 10-13-2009, 12:33 PM

I dont have emissions or anything related. So would it be fair to say, if I purchased the 3.5 I wouldnt have any issues other than a check engine?
Sound would be better?

Thanks again

Gemner · 10-13-2009, 12:38 PM

yes, if you dont mind an SES the 3.5 headers are better

mrood1986 · 10-13-2009, 12:39 PM

Alright, well I guess I have my choise- 3.5

If anyone has any experience with a certain ebay seller regarding 3.5 headers please post. Thanks!

e-subliminal-2 · 10-13-2009, 12:41 PM

+1. the unequal y does make a HUGE difference in sound......

modenaf1 · 10-13-2009, 12:43 PM

If I recall correctly, the 3.5 version of the OBX headers and y-pipe are equal length (much better sounding) end the 3.0 version is not, is that correct?

I too have this dilemma with my 4th gen. It would be nice to go equal length, but I can't afford to lose my EGR. I wonder how hard it would be for an exhaust shop to put an EGR bung in the 3.5 header?

MoncefA33 · 10-13-2009, 12:47 PM

Quote:

Originally Posted by modenaf1

If I recall correctly, the 3.5 version of the OBX headers and y-pipe are equal length (much better sounding) end the 3.0 version is not, is that correct?

I too have this dilemma with my 4th gen. It would be nice to go equal length, but I can't afford to lose my EGR. I wonder how hard it would be for an exhaust shop to put an EGR bung in the 3.5 header?

I would ask and see what they can do for you.

e-subliminal-2 · 10-13-2009, 12:48 PM

i;d go threw the hastle of having a shop put one in for you, it makes hella difference. And you are correct. The 3.0 do NOT have a equal length Y pipe. The 3.5's do.

mrood1986 · 10-13-2009, 12:52 PM

what do you mean about making hella difference?

Purchased headers btw

e-subliminal-2 · 10-13-2009, 01:14 PM

Quote:

Originally Posted by mrood1986

what do you mean about making hella difference?

Purchased headers btw

The sound of the 3.0 unequal length y makes a HUGE difference from the equal 3.5

Grand_hustle17 · 10-13-2009, 01:50 PM

Quote:

Originally Posted by e-subliminal-2

The sound of the 3.0 unequal length y makes a HUGE difference from the equal 3.5

i must ask whats this "hella difference also" mines isnt loud at all... if you are basing your opinion off ya boy MU_036spd then i can see why you say something about the sound... he is using a ebay tip and deleted cat... its really not any difference in sound...

Grand_hustle17 · 10-13-2009, 01:52 PM

to the OP if you have a 5th gen, why not save youself the hassle and get a warpspeed Y-pipe???

MoncefA33 · 10-13-2009, 01:53 PM

Well it obviously depends on the rest of the exhaust setup.

You would wanna get a bigger resonator if you were looking to compensate for the sound of an unequal length downpipe. And possibly stick with the stock muffler.

Grand_hustle17 · 10-13-2009, 02:04 PM

i've got a 2.5" custom 22" resonator and a cattman axleback... no drone nor noise whatsoever

e-subliminal-2 · 10-13-2009, 02:25 PM

Quote:

Originally Posted by Grand_hustle17

i must ask whats this "hella difference also" mines isnt loud at all... if you are basing your opinion off ya boy MU_036spd then i can see why you say something about the sound... he is using a ebay tip and deleted cat... its really not any difference in sound...

Possibly

e-subliminal-2 · 10-13-2009, 02:26 PM

Good choice with going with the 3.5's. good luck with the instal.

mrood1986 · 10-13-2009, 02:30 PM

Quote:

Originally Posted by e-subliminal-2

Good choice with going with the 3.5's. good luck with the instal.

Thanks

e-subliminal-2 · 10-13-2009, 02:31 PM

Quote:

Originally Posted by Grand_hustle17

i must ask whats this "hella difference also" mines isnt loud at all... if you are basing your opinion off ya boy MU_036spd then i can see why you say something about the sound... he is using a ebay tip and deleted cat... its really not any difference in sound...

Also it sounded different before he got his ebay catback. When he had his main cat still on, and res, and cattman replica exhaust. Sounds good to some, good at wot. Idle it's too loud imo.

Doesn't matter though, he's purchased his headers. Only advice now, gl with the instal. Prepare to use almost every curse word in the english dictionary. And have patience

Grand_hustle17 · 10-13-2009, 02:34 PM

lmao!!! yes

Grand_hustle17 · 10-13-2009, 02:40 PM

Quote:

Originally Posted by e-subliminal-2

Also it sounded different before he got his ebay catback. When he had his main cat still on, and res, and cattman replica exhaust. Sounds good to some, good at wot. Idle it's too loud imo.

Doesn't matter though, he's purchased his headers. Only advice now, gl with the instal. Prepare to use almost every curse word in the english dictionary. And have patience

im speaking from experience... i had the exact same "knockoff" exhaust with a cat

e-subliminal-2 · 10-13-2009, 03:06 PM

Quote:

Originally Posted by Grand_hustle17

im speaking from experience... i had the exact same "knockoff" exhaust with a cat

Yeah, but it's still a matter of opinion. I find a difference but I guess most don't. Either way no point in beating a dead horse. He's ordered obx. Good choice imo. Gl, You WILL need it. take your time and make sure to do it all right the first time, it's never fun to have to take crap back off when you realized you forgot something small. And don't forget to get creative when doing the instal, it'll keep yourself busy.

P.s. Make sure no guns in site

mrood1986 · 10-13-2009, 03:13 PM

With these headers (obx 3.5) how many O2 simulators will I need?

Again not to concerned with the SES light just dont want to be running extremely rich or lean or to have some random holes open.

How many and which kind (dual or single)?

shadyonedeath · 10-13-2009, 07:45 PM

Im calling bull**** on you searching. Quit being lazy and having everyone spoon feed you. There's 8+ page threads on these headers.

mrood1986 · 10-13-2009, 07:56 PM

Quote:

Originally Posted by shadyonedeath

Im calling bull**** on you searching. Quit being lazy and having everyone spoon feed you. There's 8+ page threads on these headers.

Thanks for the information!

mist max2000 · 10-13-2009, 09:11 PM

i thought you needed the egr for the car to run properly... no? u might need to get one added in....

and find the thread..its awsome.. install pics and everything.. you can plug the secondaries and use a dual 02 sim and sim the secondaries..

mrood1986 · 10-13-2009, 09:29 PM

Quote:

Originally Posted by mist max2000

i thought you needed the egr for the car to run properly... no? u might need to get one added in....

and find the thread..its awsome.. install pics and everything.. you can plug the secondaries and use a dual 02 sim and sim the secondaries..

That is exactly my question. I found the How To: thread on installation

But WILL I need to have an EGR put in in-order for the car to run correctly?
I didnt think so, but if anyone knows..

maxboy01AE · 10-13-2009, 09:36 PM

so the 3.5 headers will work on my 3.0 i dont think i have EGR 01 AE 5SP HELP. THANKS

MoncefA33 · 10-13-2009, 09:41 PM

Quote:

Originally Posted by sick01AE

so the 3.5 headers will work on my 3.0 i dont think i have EGR 01 AE 5SP HELP. THANKS

3.5 headers will work on your 3.0, AEs dont have EGR.

I have 3.5 headers installed on my AE.

mrood1986 · 10-13-2009, 10:09 PM

Will not having the egr plugged in change anything regarding the engine?
I know I will have a ses light

Grand_hustle17 · 10-14-2009, 03:25 PM

i dont see how its hard to understand... headers made for a 4th gen fits 95-03. 95-00 has egr's on them so if u dont have one on the headers then get it put in, 01-03 doesnt have EGR so if u have the port on the headers then plug it... like misty said, there is threads all over the forums about headers... pimping02max had a nice write up

mrood1986 · 10-14-2009, 03:29 PM

Quote:

Originally Posted by Grand_hustle17

i dont see how its hard to understand... headers made for a 4th gen fits 95-03. 95-00 has egr's on them so if u dont have one on the headers then get it put in, 01-03 doesnt have EGR so if u have the port on the headers then plug it... like misty said, there is threads all over the forums about headers... pimping02max had a nice write up

I understand that. But if you have an EGR what happens if you just dont plug it in? (besides a SES light)

Grand_hustle17 · 10-14-2009, 03:43 PM

idk... never got headers without an EGR... 4th gen through 5.5

... try pming pmohr he has all the correct answers as far as VQ motors go

Gemner · 10-14-2009, 03:50 PM

Quote:

Originally Posted by mrood1986

I understand that. But if you have an EGR what happens if you just dont plug it in? (besides a SES light)

nothing, AFAIK

maxboy01AE · 10-14-2009, 06:18 PM

Quote:

Originally Posted by MoncefA33

3.5 headers will work on your 3.0, AEs dont have EGR.

I have 3.5 headers installed on my AE.

thanks.

mist max2000 · 10-14-2009, 09:52 PM

not sure.. but just read something where cold starting with no EGR will be a problem.. your going to need to get an egr bung welded on.. im pretty sure..

modenaf1 · 10-18-2009, 11:06 AM

I've been running with disabled EGR on my 2001 Intake manifold swapped VQ30DE. Only thing I have noticed is worse fuel economy, and there is no way I will pass emissions with the EGR disconnected.

mrood1986 · 10-20-2009, 06:36 PM

So I have another question about the install..
I got the y pipe off and the front header. I see that I need to take the upper intake manifold off. I see that there is a write up for the 4th gen Removing Upper Intake Manifold (UIM) w/pics .. is that basically the same thing for my 5th gen?

I have these links as far as write ups
Installing Headers this weekend!!!
http://www.nicoclub.com/articles.php?id=215223
Complete OBX Headers/Y-pipe Installation Writeup

Anything eles I should know?