headers?

[Seanzyyy]

are there any aftermarket headers that will pass emissions?

i was looking at these:http://cgi.ebay.com/ebaymotors...ories

http://cgi.ebay.com/ebaymotors...Parts
Modified by Seanzyyy at 12:31 AM 10/29/2009

[ashibah83]

a header shouldnt really modify your emissions, unless it has to be C.A.R.B. or SMOG exempt, but honestly i wouldnt even waste my money on a "Header", any HP increase that those claim is a lie

[Seanzyyy]

well im not really concerned about performance increase. my o2 sensor is frozen, and my cat is prolly bad.i was just looking for an alternative that wouldnt effect me passing emissions

[numbnuts240]

you would still need a cat and a functioning o2 sensor to pass emissions.

[skyline3489]

i wouldnt bother buying ebay headers, when i first got my s14 i learned not to. bought a pair of headers and downpipe. the egr hole in the headers didnt even line up with the egr tube

[sr20power]

it depends on where you live and the rules there. Here in Cali, you couldn't pass the visual inspection if you had a aftermarket header.

I believe that DC header have a CARB stickier.

[simmode1]

i wouldnt bother buying headers, PERIOD.

Fixed.

I have a header. Utter waste of time. Save your money for more useful mods, like turbo-stuffs, swaps or suspension goodies.

[Seanzyyy]

of coursee.but im looking at headers as a cheap alternative to get through emissions.its either headers or torch out the o2 sensor, weld a bung for it, and buy a new cat.the car has 2 cats and i've been told by a local shop that out here in tucson s14's have passed with long tube headers and only 1 cat but im not too sure about it

[jeff420]

i have 2 obx headers' and they fit and work just fine. i wouldnt say it was a waste either. not like i gained alot of power but with everything i have done to my car it has helped. plus it looks alot better than the HEAVY cast pos. someone on here did some comparisions of different brands and made their own and had dyno results to prove it made the most power. if you get one try to go for a dc or hotshot. def get it coated.

my car all motor spanks every all motor 240 i have raced so id say the header probably helps a little. that and the 3 inch exhaust and xcessive intake manifold.

heh, ive always wondered if my car would pass emmisions testing. never tried because i dont want my car in any "database" sayin its failed. plus the 2 foot flames it throws probably means i wouldnt lol. i just suck it up and pay extra.
Modified by jeff420 at 8:37 PM 10/29/2009

[Papi Chulo]

3" Na exhaust, I bet that sounds great

[nifares240]

header is nice to have when keeping NA. It's not a waste of money. Not everyone wants to kapisssh. The HotShots are nice and wish they are still around. DC's are great too.

Op, you should still be able to pass emission. just make sure your car runs correctly not too rich.

[asoomal]

I've got a DC Sport header on mine, TOTAL waste of money. I've lost some low end too and it makes my exhaust sound like poo.

[nifares240]

put the old s*** back and sell it to someone who wants it.

[giodachamp]

3" Na exhaust, I bet that sounds great

Actually it does

[Seanzyyy]

my main concern is the check engine light since i have obd2.my friends civic is obd1 and with his headers the light is off.

they all have o2 sensor inserts already but i've messaged 2 brands. 1 said its not smog legal and the other said i wont pass emissions.

but in a way i dont believe them lolanyone with obd2 have any success?

[nifares240]

i don't think header will make much difference on o2 reading. if you are putting a test pipe in, you might throw a CEL light.

had a header on my 1998 Prelude, never had a CEL light or other issue.

[Wc240]

dont believe them, they only sell stuff, not like the'd know anything

if it has the O2 bung, and can hook up to the original cats, then you may be able to pass the sniffer, but you will fail any visual, including the midnight stop by the boys in blue. man up and take out the O2 sensor. fix your car before you mod it!

there not a waste of money. easiest way i can show this is look at all the pro built motors, how many run stock exhoust? just becouse it doesnt make as much as a downpipe on a turbo'd car, doesnt make it worth nothing.OP, i suggest you read up on what OBD@ is, and the basic principles of a 4 stroke engine, then read up on the laws in your area.

[jeff420]

3" Na exhaust, I bet that sounds great

aye papi,

it sounds amazing. loud as s***. apexi n1. everyone hears me coming. my friends hear me coming 5 minutes before i get to their house. ensures their ready by the time i get there. cops hear me coming 5 minutes before i pass them so they can get their radar ready. when people talk about my 240 they refer to it as that fast as fawk loud a** 240. i LOVE it. i have plans on going turbo so i saw no point in buying some small a** exhaust and then buying another when i upgrade. i have almost everything to go turbo just need a couple more things. car already runs high 12's so its not like im some fanboi that threw a 3" exhaust just to say i did. could it be smaller? yes im sure. but like i always say, ask your girl if size matters.

[sommmatt]

So much fail in this thread.

A header will not eliminate your need for an o2 sensor or a catalytic converter.

You will not pass emissions without either of these items! Your o2 sensor tells the motor when to add or pull fuel, the catalytic converter removes pollutants from your exhaust. Without an o2 you'll run really rich, and without a cat you're surely to fail on HC, CO2 and NOx!

[jeff420]

So much fail in this thread.

A header will not eliminate your need for an o2 sensor or a catalytic converter.

You will not pass emissions without either of these items! Your o2 sensor tells the motor when to add or pull fuel, the catalytic converter removes pollutants from your exhaust. Without an o2 you'll run really rich, and without a cat you're surely to fail on HC, CO2 and NOx!

x2 i have both a functioning o2 sensor and a catalytic converter on my car.

[Seanzyyy]

So much fail in this thread.

A header will not eliminate your need for an o2 sensor or a catalytic converter.

You will not pass emissions without either of these items! Your o2 sensor tells the motor when to add or pull fuel, the catalytic converter removes pollutants from your exhaust. Without an o2 you'll run really rich, and without a cat you're surely to fail on HC, CO2 and NOx!

uhmmm i never said it eliminates the need for them... i know i need the o2 sensor.my question was that since my car has 2 cats, headers would delete the front cat, making my car run on only 1.

i have a friend that had a ka24de swapped s13 and ran with only 1 cat and it didnt have the CEL on.

my question was simply that if i ran my car through emissions with headers (which would have o2 sensors in of course) and only the rear cat, i should still pass because the CEL isn't on, correct?

[jeff420]

i know on certain cars that have 2 cats if you remove one then you will throw code. depends on how many o2 sensors you have, i know nothing about the obd2 systems on the 240, but on other cars you can purchase a "dummy" o2 sensor that keeps your car from throwing code. it eliminates one of the o2 sensors. hope that helps.

[Seanzyyy]

hmmwell i have 2 o2 sensors...and again that shop has told me that s14's have passed emissions without a front cat...

my friend has a civic with aftermarket headers and it doesnt throw the CEL.

this ish is confusing lol

i just need an answer from someone with a 96+ 240sx with headers and a front cat delete lol

[jeff420]

if it were me i would just do it. please stop comparing your 240 to your friends civic though, lol. if it throws code then just get one of those dummy o2 sensors. problem fixed. i knew a guy who had a header on his kouki and i dont believe he had any problems, but if he did im sure he just got his car inspected like i did mine.

are there any counties near you that dont require your car to pass the sniffer test? my 240 lived its whole life in an emmisions free county and after i bought it i just drove down there the first year to get it inspected. after that i just made some calls and got the hookup.

just remembered something that may help, my mom has a sentra spec v that came from california (i wasnt there when she purchased or i would have told her not to get it lol) and it had 2 cats. she got a header installed and it deleted one of the catalytic converters and her car throws code from time to time. she just resets it when it pops up, sometimes it just goes away on its own

[wanganss13]

A buddy of mine had a 96 240, had a dc header and only one cat, never had a problem passing smog check. Hope this helps.

[Seanzyyy]

sweet, thanks that does help alotwas this in cali?

[wanganss13]

Yeah, where smog is a b**ch to pass. and he never through a cel either. good luck with the header and remember you get what you pay for, I learned this the hard way.

[simmode1]

So much fail in this thread.

This.

3" Na exhaust, I bet that sounds great

Mine does. Not all 3" N/A exhausts are loud. Circuit Sports resonated dual tip exhaust FTW.

The only thing that's going to happen when you pair a header with a 3" exhaust is your powerband is going to move from your low end to your top end and your Ka is gonna sound like a WRX at idle. You might gain about 5-8hp (which ain't chit).

If you wanna pass emissions on the cheap, a header ain't gonna help. But making your car run right in the first place will. There's no reason why stock exhaust components in working condition will cause you to fail.

But whatev. We all know the OP is gonna buy some junk header anyways.

[OutToWinPAHC]

Long tubes allow better flow, and take away heat faster so a header upgrade is never a bad idea unless you really go over-sized and really throw off the exhaust velocity.

But yeah as long as you can still use an 02 sensor and a cat you should pass unless your state requires something like carb approved parts.

[numbnuts240]

also, iirc the cat on the dp is the one that actually makes a difference, the one further back is hollow. i found my rear one to be hollow when i changed it out for a catco. the primary one is still there. i'd find out for sure if this is true before you delete the important cat and fail emissions.