5th Generation Maxima (2000-2003)Learn more about the 5th Generation Maxima, including the VQ30DE-K and VQ35DE engines.
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Found this in the 4gen section. I can't find a pic of the old ones, but I believe they didnt have an equal lenght ypipe and the primaries look bigger on these. http://cgi.ebay.com/ebaymotors/OBX-H...Q5fAccessories
I'd be concerned with the overall quality (bought cheap headers for a Chevelle I used to have, broke at a couple welds after a few years) at that price but it does appear to have bungs welded in for all O2 sensors. Probably not going to get the same gains as Cattman's but probably still better than stock.
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2002 Maxima SE, NWP block plate, GAB, K&N panel filter, Vibrant FSTB, grounding kit.
This will definately flow better than stock for us 5 and 5.5 gen guys. The quality and fitment probably sucks, but we cant really complain becuase it seems like they are trying to give us a decent product. Look how many times they've changed the design and each time was better than before.
Factory style > shorty > long w/ 90 degree collector > long w/ smooth collector > equal length. (or what looks like equal length)
It looks like they are trying. And for that price, its worth a try.
This seems to be a 2 piece design from the pictures. Similar to cattman's gen. 1(?) design. It's gotta be a pain to install.
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01 I30, [5 speed swap][4th gen pedals and master cylinder][OEM clutch][OEM flywheel][ksport coilovers front, D2 coilovers rear][10k hid headlights and fogs][custom WAI][cattman exhaust][tenzo type-M, 19x8.5 +17F, 19x10 +22R][300zx calipers][Cobra 13" drilled and slotted rotors]
5 speed swap myths BUSTED:
1. Both driver and passenger side AUTO axles work fine.
2. AUTO flywheel bolts work fine.
Gen 1's were four pieces. Then he went down to three pieces, primaries and the y pipe just like the Hotshot headers. One question everyone should ask is how in the world do they want us to install the y-pipe that's attached to the rear manifold... PITA
It looks like it's got all four o2 sensor. 00's need EGR which doesn't seem apparent in this set.
wow..sweet... but yeah.. install on the rear header being connected to the y pipe ,..holy crap.. if they only had some pics of the product installed...
...weird.. only thing listed on their website is the shorty ones .. which suck... and there 600 bucks on there.. lol WTF i guess next step is to show them the ebay link and ask.. lol EDIT: just contacted them... ill let u know if they respond...
well, they put the secondary o2 bungs in there, but the secondaries won't work without a cat to read, IIRC, so it's kind of pointless to put them in unless you want to run a double wideband set up. Correct me if I am wrong?
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6MT | 06HLSD | I/H/E & FC | Stillen FSTB & RSB | Eibach Pro Kit | Illuminas | Watkins STS | UDP | NWP Spacers | Greddy Blue | ES Bushings
253.50 fwhp
249.75 lb/ft tq
14.3 @ 101mph (street tires, bad wheel bearing and a few spun tranny bearings)
well, they put the secondary o2 bungs in there, but the secondaries won't work without a cat to read, IIRC, so it's kind of pointless to put them in unless you want to run a double wideband set up. Correct me if I am wrong?
I believe you need the secondary 02 sensors with a 02 sim to keep off the CEL. Setup looks nice, but as mention before that Y-Pipe with the rear manifold will be a Biatch to install.
Cattman FTW !
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Last edited by ae01maxine; 12-15-2008 at 07:11 PM.
Since aftermarket headers remove all pre-cats on the 00-03s, something has to be done about the secondary O2s since they now have nothing to monitor and will cause the ECU to throw a CEL to indicate that the pre-cats aren't working right (because they aren't there anymore). The DTCs will be P0430 (front bank or Bank 2 precat) and P0420 (rear bank or Bank 1 precat).
The secondaries can be simulated using a dual output O2 sim, but you need to keep the sensors plugged into the harnesses because the ECU needs to read voltage from the heater wires. These heater wire signals are not simulated by the O2 sim. You can find resistors to simulate these and do away with your secondaries altogether
They look good and I haven't seem a pic of the 3rd gen Cattman's for the 3.5. I wonder if both the 2nd gen OBX's and 3rd gen Cattman's for the 3.5 will fit with the Blehmco LTB II? Anyone?
Summary = OBX not 2.5" after flex section and to use OEM gaskets not supplied POS ones.
That is their old header design though. Pics aren't great in the ebay ad, BUT it does appear the section after the flex pipe is larger then in the old design.
What are you referring to when you state "their old header design?" I was asking about both OBX gen II and Cattman gen III.
When it comes to the Blehmco LTB II, I believe I've read several threads with people running headers with the Blehmco LTB II.
After further review: I stand corrected. My memory failed me. The best info I can find is on the Blehmco site, and it does not speak to header fits, other than to point out that Cattman headers do not fit. It only speaks to Y pipe fits.
It does seem that the OBX gen IIs MIGHT fit, given the tight elbow where the rear bank goes horizontal and turns toward the rear of the vehicle. Maybe DaveVQ or Puppetmaster can share their personal observations here?
Sorry for the noob call on the "several threads" statement. Let the flaming commence.
Last edited by diverdown3; 12-20-2008 at 09:33 AM.
EDIT: nismology pointed out how tight the loop on the y-pipe is, I wonder if you can actually fit a LTB around those OBX headers. That was the main thing that prevented us from fitting one (unmodified) over the Cattman headers.
Here's my test fit:
On another note, those with the OBX headers should at least be able to change their oil easier than me... lol.
Last edited by Puppetmaster; 12-17-2008 at 07:18 AM.
Since aftermarket headers remove all pre-cats on the 00-03s, something has to be done about the secondary O2s since they now have nothing to monitor and will cause the ECU to throw a CEL to indicate that the pre-cats aren't working right (because they aren't there anymore). The DTCs will be P0430 (front bank or Bank 2 precat) and P0420 (rear bank or Bank 1 precat).
The secondaries can be simulated using a dual output O2 sim, but you need to keep the sensors plugged into the harnesses because the ECU needs to read voltage from the heater wires. These heater wire signals are not simulated by the O2 sim. You can find resistors to simulate these and do away with your secondaries altogether
You are both correct but I think you are misunderstanding what the other is trying to say....
the gen 3 headers are even worse for changing the oil. There is a skid plate which runs from front to back of the loop. So the oil wants to pool in there unless you have a fancy funnel
__________________
6MT | 06HLSD | I/H/E & FC | Stillen FSTB & RSB | Eibach Pro Kit | Illuminas | Watkins STS | UDP | NWP Spacers | Greddy Blue | ES Bushings
253.50 fwhp
249.75 lb/ft tq
14.3 @ 101mph (street tires, bad wheel bearing and a few spun tranny bearings)
Since aftermarket headers remove all pre-cats on the 00-03s, something has to be done about the secondary O2s since they now have nothing to monitor and will cause the ECU to throw a CEL to indicate that the pre-cats aren't working right (because they aren't there anymore). The DTCs will be P0430 (front bank or Bank 2 precat) and P0420 (rear bank or Bank 1 precat).
The secondaries can be simulated using a dual output O2 sim, but you need to keep the sensors plugged into the harnesses because the ECU needs to read voltage from the heater wires. These heater wire signals are not simulated by the O2 sim. You can find resistors to simulate these and do away with your secondaries altogether
In which case, you would end up plugging up the 2 extra bungs, as they are not required. I guess you could spend the extra time extending the wires for the heater circuit, but why waste the time.
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6MT | 06HLSD | I/H/E & FC | Stillen FSTB & RSB | Eibach Pro Kit | Illuminas | Watkins STS | UDP | NWP Spacers | Greddy Blue | ES Bushings
253.50 fwhp
249.75 lb/ft tq
14.3 @ 101mph (street tires, bad wheel bearing and a few spun tranny bearings)
I would definatley be interested in these way more affordable. If anyone picks up a set keep us posted on what you think.
+1.. for cheaper then a catback.. you can have equal length headers that are 2.5'' all the way through.. ill buy some if someone can help me install lol ill pay w/e...i dont have any access to a lift,..
+1.. for cheaper then a catback.. you can have equal length headers that are 2.5'' all the way through.. ill buy some if someone can help me install lol ill pay w/e...i dont have any access to a lift,..
Where do you live? I've done a few header installs and now have access to a full shop with lifts.
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2K2 SE 6 speed w/leather, sunroof and Bose : HLSD tranny from 2004 car, Fidanza 15lb flywheel, 350Z clutch, Hotshot headers, Warpspeed B-pipe, PR CAI, homemade VAIS blockoff plate, Apexi S-AFC2, 17 degree timing advance, HP autoworks STS, PR solid motor mounts, PR shifter bushings, FSTB, RSB. Eibach springs with Ilumina 5-way adjustable struts, 16.5 pound Enkei Wheels. Over 145,000 miles. I turn my own wrenches.
Didn't the Cattman Gen I's come with a two piece y-pipe? I seem to remember the flex section being its own piece...
Btw...
Yep, I forgot about that. I just recently had to remove my rear manifold to fix an escaped EGR plug. But never realized the flex section was part of the mix, since I really didn't have to mess with it
__________________ 03 SE 4AT 242whp/238wtq
95 SE 4AT 235k Miles
EDIT: nismology pointed out how tight the loop on the y-pipe is, I wonder if you can actually fit a LTB around those OBX headers. That was the main thing that prevented us from fitting one (unmodified) over the Cattman headers.
Here's my test fit:
On another note, those with the OBX headers should at least be able to change their oil easier than me... lol.
Guess I'll be making a funnel with hooks for my 3rd gen CM Headers, I've been prepping and cleaning the ports, inlets, outlets of weld thru growths or splatts! May have to install b4 I send off to ceramic coat so I can rethink the wideband O2 bung location and now this oil drainage saga.....
no cel with o2 sim BUT, it may come on and turn off every now and then but it isn't a big deal..there was a thread on it somewhere.
Depends, my O2 sim has had no codes for the 3 years I've had em, but I know people who've been through 3-4 and they don't last more than a few months w/o throwing codes.
. Are you sure?
I just recently had to remove my rear manifold to fix an escaped EGR plug. But never realized the flex section was part of the mix, since I really didn't have to mess with it 
I might be up for that considering in Dallas right now it is 24 with an 11 degree wind chill...
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