How to Install 01-05 Honda Civic LX D17A1 4-1 Header

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[@AjMtattoo]

I found one of these headers in a Pull-a-Part on a 7gen civic. It looked fairly clean and in good shape so I pulled it and slapped it onto MY 7gen shitbox civic. I already had a 3” exhaust kit so now it’s almost a straight pipe lol. Definitely worth the $20.

[@hendrix87boss]

Not really now u have check engine light and ur air fuel ratio is not off and will cause stalling and problems later

[@carlosuno7657]

Finally the video I'm looking for.

[@dnamotoring]

We appreciate the feedback!

[@davidmacomber1373]

Where are your spring bolts? That’s a good amount of pressure on the headers. But nice video thanks

[@j_hORn]

wont this cause a check engine light because the original manifold has a built in cat converter...and the headers do not?

[@sinnerxvi]

on a civic a check engine light is pretty permanent once you hit about 100k miles just because it recognizes small leaks etc about pretty much anything so my guess is probably but I wouldn't worry too much

[@bored2323]

It will mess up ur ECU and ur Air Fuel ratios , it happened to me Do Not Waste Your Money and Time , just get a replacement if u need it

[@MiguelGTR34]

@@bored2323damn so not worth it? Lol guess just get a normal replacement

[@hendrix87boss]

​@@sinnerxvihuh? My 05 Honda civic has no check engine light I'm at 256k 😮 take care 😘 f ur stuff yes this will cause light to come on u DNT want that ....that is not oxygen sensor that a air fuel sensor and it has a wider frame of measurements in the system u remove that and it will run poorly I just replaced mine and it runs waaaaay better ....and got my light off and no codes anymore

[@F10natee]

@@hendrix87bossI’m at 237k 2001 ex coupe 😅

[@draytonpitts9261]

Can I ask where you got that exact manifold

[@yezminvazquez4601]

Which brand u recommend me to put it with out check engine light come on?

[@VtwinGamingKimico52]

None, you will need to do the non fouler trick regardless

[@macmanbryant6973]

how is the fuel consumption?

[@kracksmith4ejm1]

is there a concern if there is no OEM spring between the header and exhaust. I didn't see a flex pipe too. I'm thinking it could crack the header?

[@johnh9507]

I would think you could re-install the oem bolt and spring just get metric nuts

[@archibaldfabrigaras5969]

can i ask what are the tools to be used? especially for the O2 sensor plugs? thanks

[@jamesbaker1392]

An o2 sensor socket. Can get at any autozone. You can even get them on amazon.

[@MrAjk333]

Also if you take it all the way out you can just loosen it with a wrench

[@melbatoast1985]

what are the results of the dyno run?

[@chichorocha6170]

The 2 top heat cover bolts are the same top 2 for the manifold?

[@slamn690]

It's deleting the cat converter?

[@angelgabrielortiz5943]

Ik this video pretty old but how did you avoid getting either Code P0420 or P0141? And is relocating which sensor the best idea?

[@tazinfluence5356]

Buy a defouler

[@franciscotrujillo5063]

@@tazinfluence5356 where frm

[@autolife8840]

What about the dyno results?

[@jamesbaker1392]

you legit think some headers are gonna give you any significant gains? this is why honda dudes arent taken seriously lmao. these might give you 5 hp if the AC aint running, if youre lucky. if this is the only thing youve done to your d series.

[@trevormorgan7138]

@@jamesbaker1392 Its a cat delete on a car with already a whopping 115hp tuned with a sluggish MAP sensor. You are gonna notice the difference... People don't buy these to race... they upgrade them to make them safe to merge onto a freeway in LA. lmao but the real issue is the untuneable ECU. Granted these things can be ran into the ground because that MAP sensor gives no fucks about intake leaks.

[@andiepie82]

Doesn't matter if it adds 5 or 15....every bit that you add is that much more that you didn't have. And then if you do other small stuff, like add cold air intake, a decent exhaust....it all adds up. A bunch of small pluses can end up pretty decent, so don't be so hard about it. James baker

[@rullmourn1142]

great verbal skills.

[@dnamotoring]

Thanks for the feedback

[@nwga.5327]

Compliments a very technical video

[@poolboywillis1225]

Hey help and thanks! My 03 civic LX has a clogged d converter what can I do like this to bypass expensive converter replace and at the same time put on some cooler parts like this?

[@AlexJustKills]

Yes did it to my nissan make sure everything is hooked back up right the check engine light should go right off

[@noventay4]

When you put the header you will delete the cat

[@joshuadelmas9723]

So did the header bolt up to factory exhaust because I just bought the dna 4to1 header

[@j_hORn]

product link says unavailable. can you recommend another part that will fit my 2003 Civic 4dr DX? Thanks!

[@tayaria7280]

I like to put header wrap on them stops the heat from escaping into the engine bay and protects the header from rust

[@ipdjbt]

You're nuts if you think heat wrap prevents rust. It does the opposite.

[@AnthonyLivesTwice]

What tools are necessary?

[@Gregsbeans]

From what I could see, a wrench with a long extension, jack stands and a jack, and the o2 sensor removal tool. An impact is a nice thing to have but not needed

[@Preztigi]

Do you know if this D17 engine fits in an ep1 civic? great video by the way

[@dnamotoring]

Thank you and I'm not sure.

[@pyrexjdm8433]

Yes it fits

[@aidanbarney7082]

So would I be able to add a hi flow cat after the headers and relocate my o2 sensors to still pass emissions?

[@dnamotoring]

These delete the cat that was in the factory manifold. Not sure if you can install a cat after this and pass a visual inspection. At least in california, you can't.

[@stepintimesmith9607]

You can always buy a cheap catheader to get past emissions then do this mod for the rest of the year.

[@andreinapalacios7887]

What are all the tools I would need?

[@chaseboy225]

Is a tune required?

[@Bucky0012]

Will my check engine light come on if I get this header ?

[@Jerry-gn6nh]

As long as you replace those 02 sensors in the right place (you have your upstream and downstream). Then no your check eng light should not come on

[@jm_pg3557]

My automatic 2001 honda civic lx engine just blew up, can i put a vtec motor? Or is there a lot of modifications that have to be done?

[@dnamotoring]

To swap to a d17a2 engine you need the engine with all sensors and the d17a2 ecu

[@cubanman2009]

Hey @DNAMotors I need the flange gasket but I can’t find the right part number I have the same car from this video..!

[@dnamotoring]

Our customer service can assist you with this. Please email [e-mail]. Thank you.

[@johnh9507]

why not reinstall the springs on the exhaust

[@Og_ChampChamp]

Exactly

[@frederickflores8152]

Check engine light or limp mode at all with the cat being gone? I've got one of your headers but read on forums that it'll cause a limp mode if it doesn't have the cat but I've also read that some civics of this generation don't have issues with the cat gone.

[@dnamotoring]

The factory manifold has a cat built right into it and there are 2 o2 sensors built into it. One before the cat and one right after it. The rear one measures the exhaust after being passed through the cat so the reading should be different than the one before the cat. Since you're deleting the cat all together both readings will be the same. What you want to do is put an "o2 sensor spacer" on the o2 bung at the bottom. It pulls the sensor away from the exhaust stream so it picks up less and makes the ECU think cats operating normally.

[@andrewlemon2717]

dnamotoring what size should the o2 sensor spacer be? please respond

[@adamfmacneil9602]

iv got both the light and limp mode after installing on mine . trying to find a local shop with a o2 spacer or spark plug non fouler is impossible lol

[@gapongsixty9412]

Hi. is your headers fits also to honda 2004 honda civic vp. Thanks

[@dnamotoring]

You can find out if your vehicle fits by using this link. amzn.to/2GE2w9j

[@jnutz4871]

Everything from 2001-2005 civic should fit a 2004 civic but it depends on if its the si model or non si model of its not the si then youre working ex through lx civics these headers should fit all lx models the ex models have a different downpipe you would need different headers because of the location of your catylitic converter and the shape and length of the downpipe the 02 sensors in the ex and lx are also in different places make sure you get the ones that fit right for the car but watch out for emmsions of you drive the lx model becaise there is no cat on the manifold it isnt street legal the ex has the cat on the downpipe so whatever header you use on that model will be street legal no matter what

[@jesuspena3190]

Was the top nut on exhaust flange welded in place ? Mine seem to not budge so with a drill and extension with 12 mm will that get it off from underside as you did ? Anyone ?this Guy seems to not reply 🤦‍♂️

[@jnutz4871]

None of the flange bolts should be welded on, they may be seized. Try to use some penetrating fluid. Spray the fluid on the bolts and let them sit for in between 5-15 min and try to break them loose it should work out if not you can always use a gas torch and heat them up and then get your ratchet and break them loose.

[@guardian8319]

It was just rusted on there hard i used WD-40 and a 25” breaker bar to break it loose although my socket kind of rounded the bolt a little bit it did come off easy.

[@christiannava4509]

Can it fit ex model? If not, where can I find one?

[@josearrindellaquino3837]

Que hiciste con los sensores de oxigeno

[@buddhamane7126]

I just got my headers installed I will give an update once they set it and drive the car for a week but first impression good quality everything fit and matched up

[@ineednos]

Any update?

[@AnthonyLivesTwice]

Does the smell ever go away, I’m going to pass out

[@jamesbaker1392]

@@AnthonyLivesTwice lmao

[@dnamotoring]

PURCHASE HERE: amzn.to/2GE2w9j

[@dnamotoring]

Thanks

[@LegendsBasketball2024]

@@dnamotoringyou’re welcome

[@marcosbezerra4741]

Excelente amigo colowuei no meu honda Civic d17 2004

[@daybis7359]

Si pass the smog? O I need put the sensor O2

[@emojihappytears9814]

What is the HP gain

[@saugustine3253]

If you don't have a good exhaust behind it as well then definitely not much. Less than 10hp probably

[@jasonHadley420]

Hey.. How could i hook up a header with No cat and not throw a check engine light? I bought the Magna flow header and Cat togther and it was Junk.. Please Help

[@fentanylmcflurry5633]

o2 simulator attaches to o2 sensor

[@joanespik]

JayH24 Install an o2 spacer friend, aprox 10€

[@isnowyazn]

JayH24 You're never supposed to use an O2 simulator or non-fouler on primary/upstream O2 sensors because it messes with the A/F ratios.

[@bladerunner8865]

Leave the up stream(air/fuel)o2 in, pull the down stream o2, leave it plugged in and just tuck is some where it can get a flow of fresh air, its post cat so it needs to read "clean exhaust" this way also gives you the worlds most efficient converter on emissions! Lol

[@victorgomez5165]

Do you have to disconnect the battery to change out cat/sensors?

[@xytics5519]

yes

[@MFDRIVE909]

Can this work on my 01 lx with the same engine?

[@victormontez2038]

No

[@xytics5519]

@@victormontez2038 wym no

[@andrewmonahan284]

And all you need is a box end wrench to remove the o2 sensor or rent a slotted socket from AutoZone

[@eddiearndt1949]

I just bought a 2001 lx I can’t tell does the stock one have a cat built into it ?

[@marcusem2485]

Yeah the header and cat are built together

[@ohstratz4747]

will this pass smog?

[@vexinmind40]

Where can I find that?

[@E92ANT]

so what happens with the cat?

[@trucavalier]

no cat which is ok for cars without wideband which will throw a CEL

[@joshuadelmas9723]

Did the header bolt up to the factory pipe or is that piping father market too

[@jnutz4871]

@@joshuadelmas9723 most headers should bolt up to the factory d-pipe no problem unless they're made for bigger diameter piping which should be stated when buying an aftermarket header and if so, means your s.o.l. But you can always do an 01-05 civic ex exhaust system swap and move the secondary o2 sensor to a direct fit catted downpipe from magnaflow or a made to fit dummy pipe from eBay.

[@pedrocalzado9186]

Will it fit a d15y6 from a 2005 civic exi sedan?

[@dnamotoring]

No

[@daltoniks]

how much is the whole kit?

[@dnamotoring]

Here's the link to purchase. It's out of stock currently though. amzn.to/36e5Sf3

[@jnutz4871]

@@dnamotoring I know amazon has great deals but don't you guy's sell them on your own website? Wtf dna?

[@PuloNimdJ]

good job bro

[@TheyknoG]

Will this one fit on the 2005 civic lx special Edition

[@jnutz4871]

If it has a d17a1 yes, but if you live in a state where emissions tests are done this header deletes the catalytic converter which is not street legal. If anything you can do an ex exhaust swap and relocate the secondary o2 sensor to the downpipe, but that would require a full replacement of your whole exhaust set up because again if emissions are done in the state you live you need a catalytic converter on the downpipe or you could get an ebay dummy pipe for the ex which also works out with no lights most of the time and the ex exhaust set up should bolt up no issue.

[@dnamotoring]

Yes

[@brianmalig1853]

does it fit in ex models?

[@dnamotoring]

Doesn't fit.

[@SPIXZY49]

Will these throw a code with no catalytic converter

[@dnamotoring]

Yes it'll throw a code. If u use a o2 sensor defouler then no it wont throw a code.

[@SPIXZY49]

dnamotoring where can I get one that will work for these

[@Simplifize]

Can’t find it on the amazon store. Where can I purchase?

[@dnamotoring]

amzn.to/2Lt32vp

[@jxdot94_13]

@@dnamotoring Amazon ran out. Any other suggestions?

[@dhesh0066]

@@jxdot94_13 Ebay has plenty of them

[@chrishuitink4083]

is this header legal in california?

[@ZorkumProductions]

nothings legal in CA lol

[@ineednos]

Haha state ref FTW lol

[@josephjoestar5444]

Lmfao

[@WestleyBates]

Just move

[@sykesgeo132]

Only thing legal in ca is illegals lol

[@alexdjgonzo9410]

No springs for flexibility??????those car has no flex pipe

[@Bav1589]

What tool is he using to remove the 02 Sensor??

[@guardian8319]

02 Sensor socket

[@gmeister03]

So no cat?

[@xhoustonkingx6212]

The link to order part doesn't work. Don't know part name either.

[@dnamotoring]

amzn.to/36e5Sf3 HDC-HC01DX

[@nandernugget]

So no catalytic converter?

[@dnamotoring]

Nope

[@juanbermudez7840]

How do I know witch sensor goes where ?

[@mushy18100]

juan bermudez make sure observe those 2 O2 sensors from the factory Headers then put it on to the aftermarket ones

[@juniordelacruz8393]

Nice headers tho

[@dnamotoring]

Thanks for the feedback

[@packzz3954]

Why you guys charge $999 for shipping on ebay? I just want a part bro

[@EmadSaadDrasticMeasuresHipHop]

this beat i reap

[@dnamotoring]

Thanks for the feedback

[@junioraguayo8574]

Are these c.a.r.b approved

[@dnamotoring]

Nope

[@alexandermachado94]

Does the header of D17A2 work for D17a1?

[@thegabrielbeals]

no

[@Big_LosF]

everyone asking questions that i would've liked to see answered... lame

[@silvereuroR]

Is this CA smog legal?

[@dnamotoring]

No, it's not.

[@odevious8081]

You're really going to dyno a civic lx? Lol

[@guardian8319]

Maximum overdrive