New v2OBX headers?
So I got these headers installed saturday and went and tuned the car today and got 250hp and 242.63 torque. I had it tuned with a VAFC2 with a mostly flat 13.1 A/F ratio. The dude said he'd email the run files tommorow. I have felt a bit of a power decrease before I had these installed and had replaced the MAF sensor thinking that would help but with 98k on my car I guess it's time to change the spark plugs finally. My current mods are Berk intake, SSIM, No VIAS, Headers, Greddy cattback, UDP, intake spacers and of course the VAFC2. My 1st run before a tune was 223hp. I would think that was pretty low for what I had. There has been 2 times before I got it tuned that I floored the car it felt just like it did after the tune. ohwell I'll have to investigate....
So I got these headers installed saturday and went and tuned the car today and got 250hp and 242.63 torque. I had it tuned with a VAFC2 with a mostly flat 13.1 A/F ratio. The dude said he'd email the run files tommorow. I have felt a bit of a power decrease before I had these installed and had replaced the MAF sensor thinking that would help but with 98k on my car I guess it's time to change the spark plugs finally. My current mods are Berk intake, SSIM, No VIAS, Headers, Greddy cattback, UDP, intake spacers and of course the VAFC2. My 1st run before a tune was 223hp. I would think that was pretty low for what I had. There has been 2 times before I got it tuned that I floored the car it felt just like it did after the tune. ohwell I'll have to investigate....
inexpensive = less performance???? Since when does the price of a mod effect gains? Seems that OBX is doing something right by keep production cost down of the headers and not sacarficing on quality. I think most org members are just stuck on cattman that's all even if these version 2's prove to be a great alternative
inexpensive = less performance???? Since when does the price of a mod effect gains? Seems that OBX is doing something right by keep production cost down of the headers and not sacarficing on quality. I think most org members are just stuck on cattman that's all even if these version 2's prove to be a great alternative
I'm not having a hard time at all! I installed my Cattman headers/ypipe myself... Which included air tools and hand tools, no lift, just jack stands. But the fact is I did mine and did it once, and it's still running hard like a champion with no problems nor drama! No money out of my pocket for someone else to do the work...that money you spent is another mod for me!
Last edited by maximo018; Mar 18, 2009 at 10:57 PM.
Extending the O2 sensor harness for both primary O2 sensors, and the rear heat shields adjustment back near the fuel tank! After you install you may need to have the catback cut and reduced 1/2". During the removal of the heat shields those small bolts on the rear bank heat shields were corroded and a chore to remove if they strip!
I used the VAFC2 to tune with and gained about 25hp from it so I would say tunning is a very important aspect. You could use a SAFC, VAFC, Emanage or whatever else is on the market to help with the tune.
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How much will the output be restricted by the stock exhaust?
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Joined: Jan 2008
Posts: 136
i have had these sitting in my house for about 2 week now b/c of time constraints. so i guess my biggest issue is how long will it take to install on 01? and also if i dont have the ac lines or a/c condenser will i have to move the o2 sensors? will i also have to tune it or will the a/f ratio be ok? also this doesnt really relate to this exact topic but how many people run mass run headers and are able to pass emissions?
You know you'll have to reposition that O2 sensor seating between the swaybar and the rack and pinion! Your header O2 sensor bung needs to be reposition(90*) to the passenger side so you may need to remove the rear section, drill it for the bung, weld it on and clean up the rear manifold/ypipe of any shavings internally and reinstall it! Hope that welding doesn't screw your ceramic coating up to bad.....
will i also have to tune it or will the a/f ratio be ok? also this doesnt really relate to this exact topic but how many people run mass run headers and are able to pass emissions?
you don't HAVE to tune headers. But there are a lot of reason's why you might want to. If you run rich after the header install you take the chance of ruining your o2's and your main cat. You will not get great gas mileage. I am getting roughly 8.6L/100km (27.something MPG) with my headers and a tune. (50/50 city/highway) That's better mileage than most stock maximas. Tuning will net you an extra 10-20 horsepower over untuned header install.
I'm not sure if anyone has ever run lean after an install but that would be a worse case scenario. Running lean will kill your engine quick. So if you are going to spend the money on headers it makes sense to spend the extra bucks and get the most power you can from them and not have to replace your cat and primary o2's because you ran rich for too long.
I'm not sure if anyone has ever run lean after an install but that would be a worse case scenario. Running lean will kill your engine quick. So if you are going to spend the money on headers it makes sense to spend the extra bucks and get the most power you can from them and not have to replace your cat and primary o2's because you ran rich for too long.
Good mechanic aint he... why ya gotta go on everybody else though jeesh manny
....this aint no turbo kit instal....
...sonds like somebody having a hard time....it only took my mechanic 3 hours to do mine....i guess if u have the proper tools and area..it makes things a whole lot easier...I'm not having a hard time at all! I installed my Cattman headers/ypipe myself... Which included air tools and hand tools, no lift, just jack stands. But the fact is I did mine and did it once, and it's still running hard like a champion with no problems nor drama! No money out of my pocket for someone else to do the work...that money you spent is another mod for me!
you don't HAVE to tune headers. But there are a lot of reason's why you might want to. If you run rich after the header install you take the chance of ruining your o2's and your main cat. You will not get great gas mileage. I am getting roughly 8.6L/100km (27.something MPG) with my headers and a tune. (50/50 city/highway) That's better mileage than most stock maximas. Tuning will net you an extra 10-20 horsepower over untuned header install.
I'm not sure if anyone has ever run lean after an install but that would be a worse case scenario. Running lean will kill your engine quick. So if you are going to spend the money on headers it makes sense to spend the extra bucks and get the most power you can from them and not have to replace your cat and primary o2's because you ran rich for too long.
I'm not sure if anyone has ever run lean after an install but that would be a worse case scenario. Running lean will kill your engine quick. So if you are going to spend the money on headers it makes sense to spend the extra bucks and get the most power you can from them and not have to replace your cat and primary o2's because you ran rich for too long.
Well I guess I didn't do my homework because I didn't know that by not tuning you could ruin an o2 sensor or cat. I probably had the headers on for a couple of years without a tune. Now I see why one of my o2 sensors failed, couldn't figure out why. Oh, well. live and learn.
Not sure if my cat has failed, how would you know if your cat has failed? Maybe I should just replace it with a high flow cat.
Glad it is tuned now and can see why it is valuable to do it. Car does get better gas mileage and feel power difference.
Definitely recommend people consider a piggyback tuning module when buying headers and not to wait to long to tune the car.
Precision Motors - $847
Premier Auto - $588 (shop looks real shady though)
The shop I'm going with, Straight Up Performance, says he's done a lot of 350Z header replacements and will do mine for $618. Estimated 8 hours of work.
Here in Lawton, OK theres not much to choose from.
Most are just used to putting ridiculous spoilers on Dodge Neons and such... feel me?
At least the emissions police don't give a damn here.
Yeah I hear that.
Problem is... there are only 2 places here that do exhaust... Midas and this garbage place called Crows Muffler and Exhaust. I took my old car there to put an HKS muffler section on. They straight cut off the old muffler and welded a new one on without any bumper clearance. I had a white car so my bumber turned black and they welded some rusty *** bars directly to the muffler tips to hold it on. Unbelievable!
Needless to say I won't go there again in my lifetime.
Good shops are really scarce in this town.
Problem is... there are only 2 places here that do exhaust... Midas and this garbage place called Crows Muffler and Exhaust. I took my old car there to put an HKS muffler section on. They straight cut off the old muffler and welded a new one on without any bumper clearance. I had a white car so my bumber turned black and they welded some rusty *** bars directly to the muffler tips to hold it on. Unbelievable!
Needless to say I won't go there again in my lifetime.
Good shops are really scarce in this town.
homeade intake,SSIM, nwp spacers, obx headers,gutted cat and 2.5 inch exhaust no resonator jus straight pipe all the way back to the greddy muffler 
where is the thread wit the exhaust clips...send me a link someone
where is the thread wit the exhaust clips...send me a link someone