CapYoda

iTrader: (30)

for the ex it bolts right up and there's no o2 sensor to worry about and no CEL should come up

lid6662

Good thats what I wanted to hear

Eeeeeeh

If you have a EX after you already have the Header, Cat-Back and Intake, once you put on the Hi Flow Cat it will make a noise like "ARRRRRRRGH!" right before you hit VTEC. It's a nice sound if you ask me.

lid6662

Heres a pic of
I got the right header this time from the company but wrong Cat! Its like 1foot to short or so.... Only got 20 miles on it so far but seems to pull a little better up top! The holes are bigger and theres nicer curves for the flow of the header than the stock ones!

CapYoda

iTrader: (30)

what does the cat look like? well i suppose if its 1 foot off then its not really for the car. heh.

518

Does any one know whats the correct part number for the 01+ Civic header?

I got this and just want to make sure I have the correct one. The box says 10057 which could be the part number. It has one O2 bung.



My LX-to-EX exhaust system (Magnaflow with RandomTech hi-flow cat. EX swaybar is also pictured)

518

Well, it turns out that I was sent the wrong OBX Header.

The upper pipe, which is the b-pipe with RandomTech cat. While the bottom pipe is the OBX pipe.

GreatWhite02

Will the Kamikaze or OBX headers BOLT on without ANY modifications what so ever? I've heard that people have had trouble with downpipe fitting and problems with emissions compatibility. i want to get either header but if it is gonna trip my CEL then I dont want to mess with it.

518

if the Kamikaze and OBX is for LX application, its a bolt on.

if you are worried about the CEL, get the LX-to-EX conversion mentioned above.

GreatWhite02

so can i use my magnaflow cat-back in this conversion? Is the sway bar absolutely neccessary? And what is all this sh** about o2 simulators?

CapYoda

iTrader: (30)

hey 518.. yeah you were sent the DX/LX header.. not the EX one..

although what you could do, since you got the magnaflow exhaust.. it has the extension pipe you have pictured there.. which was made for DX/LX application..

you can just simply bolt the entire exhaust without any high flow cat. magnaflow exhaust.. DX/LX extension pipe... DX/LX header.. and you wouldn't have to swap out the sway bar.

but you did went through the trouble to get this conversion.. so might as well send that DX/LX header back, and get the EX header.. so you'll have a working convertor that wont require o2 simulator.

as for the other question from the other guy.. you'll need a sway bar yes, because if you're getting an EX highflow cat.. it'll get in the way of the DX/LX sway bar. and an o2 simulator is for getting rid of the check engine light that will go on, if you get a "highflow cat" that doesn't really have catalyst in it.. basically just a test pipe.

CapYoda

iTrader: (30)

btw 518, can i save ur pics and use it for future reference? If I ever write any articles I may need a picture for better example and reference.

GreatWhite02

Ok so let me get this straight. For the OBX or Kamikaze headers to be legal and for the CEL to stay off, I need to get an o2 simulator, an aftermarket cat. and the sway bar from the EX Civic correct? Is the junkyard the only place that I could get an EX sway bar? How can I be sure that the pipes will all be long enough or short enough to fit? Someone was also saying something about getting an EX header. I thought the EX headers wouldnt fit LX's cuz they are bigger? Maybe Im wrong.

GreatWhite02

Hey guyz I have an update on the situation with the OBX and Kamikaze headers. I talked to both companies and they said there is no way to customize the setup to be smog and carb legal. All that stuff about Ex conversions is obsolete. You cannot move your cat. to another location cuz the computer is programed to operate with the cat where it is. If you move it your computer will not operate correctly and your car's performance will decline. If you dont care about passing inspections or getting tickets for smog violations than do what you want to do but be advised that you are going to run into alot of problems down the road. Even if it doesnt seem to be causing problems immediately after installing, it will eventually. Not to mention that these headers wont give you much if any hp boost at all. About the only thing they will do is make your exhaust sound a tad louder and more grumbly but to me that isnt worth the trouble of getting it to operate properly.

CapYoda

iTrader: (30)

no one said it was gonna be legal.

I see all these post by you and you seem to be getting yourself confused. i mean you got some facts right.. but you're getting yourself confused over words.

go take a look at your car.. the engine bay.. the pipping below to get a better understanding of whats going on.

you can grab an ex sway bar anywhere.. not just the junkyard.. the dealer can have them to you brand new.. some EX owners have swapped their front ones for aftermarket ones.. so you can check in the for sale forum.. you can also grab it online at www.hondaautomotiveparts.com, which also has more diagrams for you to look at for comparison.

if you do the correct setup, or conversion it should all bolt up fine. just gotta extend the o2 sensor wiring.

anyways I wish I can type it all out and explain to you why those companies are giving you safe answer.. and although they're correct in some sense, it doesnt necessary apply for us too.

just do some more searching, I and many other members have went over swapping out the exhaust system.. the yield it may gain, etc. etc.

I dont know why you're so confused, a lot of people have done the ex to lx exhaust system swap, and they're all running fine.. like I said, go take a look at your car maybe it'll help out more to get a better understanding..

it'll help especially to have an ex owner you can check out too. or just check out the site i mentioned above, and take a look at the diagrams.

518

You probably have, but you can use the pic anyway you want.

thanks for your reply too.

By the way, I was sent an Eclipse header but has been replaced by an EX one.

I am just about to install the exhaust this wednesday.

One question, and its been bothering me for a while.

The RandomTech Hi-Flow Cat end, why is it shaped like that? Will it still fit an EX header? The EX header will be tucked inside the RandomTech, the way I see it. I tried test-fitting the RandomTech and the Magnaflow, it looks like it will have some kinda leak due to the tapered end of the RandomTech. (see pic.)

civiclx4dr

I Will Buy The Header Off Of You I Need It Asap Tahnks Let Me Know

lid6662

All I have is the downpipe for a dx lx!

civiclx4dr

what gains do you get with the lx dx obx header?

xproductionz

iTrader: (14)

if u have a dx/lx then read this
http://www.7thgencivic.com/forums/sh...d.php?t=169411

518

In reference to what?

Get it from eBay for $135. Another seller started selling the header for 0.99cents with no reserve. The seller is cleaning up the inventory, according to the text.

Butt-Dyno tells me nothing. all I know is that I feel a bit of a pull at 4K rpm, something's pulling you but its not the vtec

For the record on my LX to EX conversion:

1. I didnt need the swaybar. 04 LX has the same swaybar as the EX.
2. I didnt need the O2 sim. One of the O2 sensor wire can be extended and reach the RandomTech hi-flow cat.
3. No leak regarding the non-tapered flange of the RandomTech since a donut is used.

Makes me wonder why OBX says on their site, CARB exempt. I could care less anyway. Just to be on the safe side or get less hassle, I have the EX RandomTech hi-flow cat. Its better than not having any at all, I hope.

xproductionz

iTrader: (14)

im just answering the original question which i referenced to the topic i made earlier to prove that i do have it and also a dx to ex conversion is possible

518

You could have just said you like it or you dont. Your link points to "DIY - DX/LX head swap to EX Vtec" topic. But I dont blame you, if I DIY something Id be proud to flaunt it in every thread that I could find

civiclx4dr

Hey I bought the dx/lx obx header for a 2003 civic lx. Is it good for gains, and will the engine light stay off?

Thanks


al R&D catback, and I have great gains on my DX stick. I don't know how some of you guys can say it doesnt do anything because it is EXACTLY the same mold as the Kamikaze header and that header is one of the best on the market today. I only paid 130.00 shipped from Ebay for it too. I would HIGHLY recommend it to anyone with an lx/dx.[/QUOTE]

03CivicEX4Door

whats the part number for that obx header for an 03 ex

Civic707Style

can't you just install the EX 4-1 headers without the cat and downpipe that come with them sometimes? That's what I was gonna do. I know the power gains are about as big as Vern Troyer but my stock one is ugly and I want a purrrrty one.

Civic707Style

ooops meant 4-2-1 header...had a lil' to drink my bad hee hee

CiViCLiZeD714

iTrader: (5)

umm the topic is olddddddddddddddddd

se7engen_riDe

^ yup...very old. i ordered obx header not too long ago. i should get it next week thursday or friday. some people here say that they felt a better pull on top end. hmm...im sure its not much but its always good to know that your car got a little bit faster eh? haha

civicph

what are the OBX headers copies of? I see some say Kamikaze others DC, which do they look like?