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Question about DC Headers? #229758 Jul 22, 9:50pm Jul 22, 9:50pm
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Question about DC Headers?
I just got my headers yesterday and i was reading the instructions and it says that they are only for vehicles that don't have (non-EGR). EGR??? i called the DC Sports and they told me it won't work on my car because my car has EGR.
So do you guys know anything about this, because these headers are the only ones that are available from DC.
Any help would be appreciated Thanx.

Igor

Re: Question about DC Headers? [Re: 2002_GTS] #229759 Jul 23, 5:15am Jul 23, 5:15am
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What is EGR


[Linked Image]
HONDA HUNTER
Re: Question about DC Headers? [Re: JSPITZ] #229760 Jul 23, 5:43am Jul 23, 5:43am
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"The EGR valve is the main emissions control component in the exhaust gas recirculation system. The valve is located on the Intake manifold, and opens a small passageway between the exhaust and Intake manifold to allow a metered amount of exhaust to flow back into the engine. This reduces combustion temperatures and helps control the formation of oxides of nitrogen. The EGR valve is opened by the application of vacuum to its control diaphragm. Some also require a certain amount of exhaust back pressure before they'll open. On newer vehicles, the valve is electronic and uses one or more solenoids or a small stepper motor. The valve should remain closed while the engine is cold and at idle. It should only open once the engine has warmed up and is running at part-throttle. If the valve sticks shut (or is disconnected), NOX emissions will soar and detonation will often result (See Detonation and Spark Knock). If it sticks in the open position or fails to close all the way, it acts like a vacuum leak resulting in a rough idle, hesitation and possible stalling."

http://autorepair.about.com/cs/generalinfo/l/bldef_165.htm

thumbsup

Re: Question about DC Headers? [Re: Speed4TheNeed] #229761 Jul 23, 5:46am Jul 23, 5:46am
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egr valve in the 7th gen celica gts:

1870126480-egrvalve.jpg
Re: Question about DC Headers? [Re: JSPITZ] #229762 Jul 23, 5:49am Jul 23, 5:49am
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Originally Posted by JSPITZ
What is EGR


EGR = Exhaust Gas Recirculation thumbsup

Re: Question about DC Headers? [Re: Speed4TheNeed] #229763 Jul 23, 6:21am Jul 23, 6:21am
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I'm thinking the DC Sports person you talked to doesn't know Jack about his own product. Lucky tested the DC Sports header for the GTS and got 10.3 peak whp.


I get my kicks on EC.
Re: Question about DC Headers? [Re: QTRMLR_1] #229764 Jul 23, 8:17am Jul 23, 8:17am
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EGR is for auto tranny...

Re: Question about DC Headers? [Re: ragingpaseo] #229765 Jul 23, 9:10am Jul 23, 9:10am
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Re: Question about DC Headers? [Re: eddie_725] #229766 Jul 23, 12:43pm Jul 23, 12:43pm
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I think they are actually refering to the setup on the 2004 gts where it has an extra sensor or somthing that would make it not possible to use this header. they mentioned that cause they are thinkin about releasing a new header for that version also. could be total BS dunno. never looked into it. I just know thats what they told me. thumbsup


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Re: Question about DC Headers? [Re: Lucky_317] #229767 Jul 23, 1:02pm Jul 23, 1:02pm
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i have EGR in my auto 95' paseo...

Re: Question about DC Headers? [Re: ragingpaseo] #229768 Jul 23, 1:06pm Jul 23, 1:06pm
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so i have this header in my room, will it fit on my 00 GTS? i was planning on installing it this weekend

Re: Question about DC Headers? [Re: 2kVeilsideGTS] #229769 Jul 23, 1:08pm Jul 23, 1:08pm
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do you have auto? i don't see why not...

Re: Question about DC Headers? [Re: ragingpaseo] #229770 Jul 23, 5:41pm Jul 23, 5:41pm
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Are you saying that only auto transmissions have egr engines?


To my girl Truboo
Re: Question about DC Headers? [Re: Tru_gts] #229771 Jul 23, 5:46pm Jul 23, 5:46pm
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I think both auto and stick trans have egr.


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Re: Question about DC Headers? [Re: Tru_gts] #229772 Jul 23, 5:56pm Jul 23, 5:56pm
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and im installing my header this weekend also.


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Re: Question about DC Headers? [Re: Tru_gts] #229773 Jul 23, 6:13pm Jul 23, 6:13pm
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which years of the celica have the egr?


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Re: Question about DC Headers? [Re: truboo] #229774 Jul 23, 6:22pm Jul 23, 6:22pm
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All of the 7th gen


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Re: Question about DC Headers? [Re: Tru_gts] #229775 Jul 23, 6:24pm Jul 23, 6:24pm
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oh thanks. kiss


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Re: Question about DC Headers? [Re: truboo] #229776 Jul 23, 8:46pm Jul 23, 8:46pm
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wait im confused now... r you sayin that i CANT install DC headers on my 01 auto gt????? confused idunnoconfused


IF YOU POST IT -- THEY WILL COME
Re: Question about DC Headers? [Re: Tru_gts] #229777 Jul 23, 11:11pm Jul 23, 11:11pm
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Originally Posted by Tru_gts
I think both auto and stick trans have egr.


i drive a 6-spd gts and i have an egr valve..it got in my way when i was putting in the updated lift bolts (since i have an '00 i have a tsb on it) thumbsup

Re: Question about DC Headers? [Re: Speed4TheNeed] #229778 Jul 23, 11:42pm Jul 23, 11:42pm
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but i thought lucky had a 2000 GTS and he had no problem with it im gettin my dc header tomorow wtf is this all about im strating to get second thoughts

Re: Question about DC Headers? [Re: Clos] #229779 Jul 23, 11:46pm Jul 23, 11:46pm
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fuck it i dont care i belive in Lucky, and if he had them on then they most work, ill post more on this after i install mine

Re: Question about DC Headers? [Re: Clos] #229780 Jul 23, 11:46pm Jul 23, 11:46pm
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^^ dc makes more than 1 header...they make many headers, actually.

check to make sure which one you bought thumbsup

Re: Question about DC Headers? [Re: Speed4TheNeed] #229781 Jul 23, 11:47pm Jul 23, 11:47pm
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i know the ones for GTS is like 4403 and those are the ones im gettin tomorow

Re: Question about DC Headers? [Re: Clos] #229782 Jul 23, 11:52pm Jul 23, 11:52pm
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^^ if thats the right part #, then it's all good.

so they finally got released after all this time? i'm behind on things i guess.

Re: Question about DC Headers? [Re: Speed4TheNeed] #229783 Jul 24, 12:10am Jul 24, 12:10am
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Yea they're finally out, I have mine right now just waitin on the new gasket so I can install it!!

Re: Question about DC Headers? [Re: tgts2000] #229784 Jul 24, 2:18am Jul 24, 2:18am
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dude, as long as ur headers are for a 00- celica gts, it will work fine. why would they release headers that dont work? wut took them so long in the beginning to make them?
answer: install it if ur car is 00-02.

Re: Question about DC Headers? [Re: 2002_GTS] #229785 Jul 24, 2:34pm Jul 24, 2:34pm
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i was just told by toyota that 2000-2002 don't have an EGR and 2003-2004 do so i guess if you have a 2003 and 2004 it won't work i guess DC will come out with the header that will work with the EGR.

igor

Re: Question about DC Headers? [Re: 2002_GTS] #229786 Jul 24, 3:55pm Jul 24, 3:55pm
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thumbsup good to know thanks


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Re: Question about DC Headers? [Re: bmw52786] #229787 Jul 24, 11:34pm Jul 24, 11:34pm
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Originally Posted by bmw52786
wait im confused now... r you sayin that i CANT install DC headers on my 01 auto gt????? confused idunnoconfused


still confused, will someone answer my question??? wtf


IF YOU POST IT -- THEY WILL COME
Re: Question about DC Headers? [Re: bmw52786] #229788 Jul 25, 2:37am Jul 25, 2:37am
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Let's solve the mystery of the GTS DC Header, folks.

Ok here is a summary of information so far:
On the DC Sports website: they say the header with part number THC4403 works for 00-03.
Someone called "Toyota" and spoke to some unspecified person who said the 00-02 GTS don't have EGR, while the 03 and 04 GTS do have EGR.
Some ecelica members are suggesting that all of the 7th Gens have EGR.
One ecelica member has brought up the possibility that the 04 GTS has a special sensor/outlet for EGR.
One ecelica member asserts EGR is for auto only.
One ecelica member asserts EGR is for stick and auto.


----------------------------------------------------------
Ok, here is my best attempt to logically approach the evidence:

So we have two main possibilities IMO.
Either DC Sports is right, and the Toyota guy talked to was wrong.
Or DC Sports does not know everything about all the years of the GTS, and made a mistake on their website by posting 00-03 when they should have posted 00-02.

These conclusions are not helpful:
It could be true that EGR is on all 7th gens.
It could be true that EGR is only on some years.
It could be true that some years have a special sensor/outlet on the header.
It could be true EGR has nothing to do with transmission, or it could have something to do with transmission.

Although it would be satisfying to one's curiosity to know what EGR applies to, the main deciding factor in functionality to be resolved:
Which years or transmissions in particular have that sensor on the stock header.

So...
If there is a special sensor/outlet on your stock header, chances are the DC Sports GTS header won't work for you.
If there is NOT a special sensor/outlet on your stock header, chances are the DC Sports GTS header WILL work for you.

Yay, hey that's simple. thumbsup

Re: Question about DC Headers? [Re: QTRMLR_1] #229789 Jul 25, 3:11am Jul 25, 3:11am
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Once we hear from at least one person from each year/transmission on whether they have that special sensor/outlet on their stock header, we can conclusively tell someone if the THC4403 header will work for them. Once we have all data (in a 5x2 matrix), we may be able to conclude that transmission is irrelevant.

Let's start posting guys...


I get my kicks on EC.
Re: Question about DC Headers? [Re: QTRMLR_1] #229790 Jul 25, 11:10am Jul 25, 11:10am
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thanks QTRMLR_1... now all i need is someone to respond that has installed DC headers on a auto???


IF YOU POST IT -- THEY WILL COME
Re: Question about DC Headers? [Re: bmw52786] #229791 Jul 25, 11:51am Jul 25, 11:51am
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yep, that's right bmw52786. That's all you need to know. You could try looking for a sensor or outlet on the stock header or anything that is different than the plain DC Sports header...anything to suggest that they are fundamentally different in components (we already know the design is different of course). It might be hard to see your whole header b/c of the heat shield etc.


I get my kicks on EC.
Re: Question about DC Headers? [Re: QTRMLR_1] #229792 Jul 25, 12:05pm Jul 25, 12:05pm
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Let's see if deductive reasoning will help us:

We're talking about THC4403 so we will assume for this discussion that everyone has a GTS.
Ok, we know Lucky installed the header and tested it on his car, so it must work on his car duh. He has an 00 Stick.

To start with:

----Stick Auto
00 Yes
01
02
03
04

There is overlap between the DC Sports statement and the Toyota statement (00-03, 00-02), so we can assume that 00-02 is ok for stick since Lucky tested fine with his 00 stick, and we know the stock header didn't change from 00-02.

So now we have:

----Stick Auto
00 Yes
01 Yes
02 Yes
03
04

That's as far as we can go for now till we get more information from people on their header or what their stock header looks like. If one person says Auto in any of the years 00,01,02 works, then all the Autos in 00-02 will be Yes. If one says No, they will all be No for those years.

Re: Question about DC Headers? [Re: QTRMLR_1] #229793 Jul 25, 3:36pm Jul 25, 3:36pm
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thumbsup

1870130889-8649-3.jpg

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Re: Question about DC Headers? [Re: Tru_gts] #229794 Jul 25, 3:39pm Jul 25, 3:39pm
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YES IT WORKS ON MY 2002 GTS AUTO


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Re: Question about DC Headers? [Re: Tru_gts] #229795 Jul 25, 3:49pm Jul 25, 3:49pm
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----Stick Auto
00 YES
01 YES
02 YES YES
03
04

And no, i do not have a sensor on my 2002 GTS Auto/Sportronic stock header.


To my girl Truboo
Re: Question about DC Headers? [Re: Tru_gts] #229796 Jul 25, 3:51pm Jul 25, 3:51pm
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and yes, i have the THC4403 DC sports 4-2-1 ceramic header.


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Re: Question about DC Headers? [Re: Tru_gts] #229797 Jul 25, 3:55pm Jul 25, 3:55pm
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i just want to get more post up, thats all smile thumbsup


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Re: Question about DC Headers? [Re: Tru_gts] #229798 Jul 25, 5:03pm Jul 25, 5:03pm
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using the previous logic, we now have:

----Stick Auto
00 YES YES
01 YES YES
02 YES YES
03
04

Now, if 03 Stick is YES, then 03 Auto is probably YES given DC Sports' generic statement that it will work for 00-03. This is not necessarily true as Toyota MAY have changed the Auto ONLY for 03, but the most likely scenario is that if DC Sports got it right for the 03 Stick, then they got it right for the 03 Auto. If DC Sports didn't get it right for the 03 Stick, then they probably DID NOT get it right for the 03 Auto. Also in years 00-02, we have concluded that what Toyota would do on the Stick's stock header they would do the same for the Auto's stock header. The most likely probability is that this sameness of the header between transmissions carries over to 03 and 04 as well.

So...

----Stick Auto
00 YES YES
01 YES YES
02 YES YES
03 ?x? ?x?
04 ?y? ?y?

The x's being the same is a more likely scenario than the y's being the same. However, both scenarios are likely.

If it turns out from reported data that the 03 Stick is different from the 03 Auto, or the 04 Stick is different from the 04 Auto, then we have to completely dump the above assumptions, and would have to rely soley on reported data from then on.

I had to put the ?'s in otherwise the spacing would not be right, and it also makes sense to use ?'s since the x's and y's aren't guaranteed but highly-probable scenarios.

We need an 03, and an 04 person to tell us if their stock header has a sensor somewhere on it.

Let's hear the 03 and 04 people speak up now. wave

Re: Question about DC Headers? [Re: QTRMLR_1] #229799 Aug 9, 3:16pm Aug 9, 3:16pm
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anyone with an 03 ?

Re: Question about DC Headers? [Re: Larry_GTS] #229800 Aug 9, 5:21pm Aug 9, 5:21pm
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everywhere I look The DC header is listed for 00-04. Is this incorrect ?

Re: Question about DC Headers? [Re: Larry_GTS] #229801 Aug 9, 5:34pm Aug 9, 5:34pm
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ok I just ordered my header I looked at DC sprots website and it was listed up to 2003 NOT 2004 so if it doesn't work I havea print out stateing their website and their customer rep was wrong, and I can return it for a full refund. it should be in a few days .

Re: Question about DC Headers? [Re: Larry_GTS] #229802 Aug 28, 12:30pm Aug 28, 12:30pm
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any news?

I got an 03 Stick, and if somebody could tell me where i have to look i will check if my car is with EGR or not..

Thanks in Advance!!

Re: Question about DC Headers? [Re: Krusty] #229803 Aug 28, 1:47pm Aug 28, 1:47pm
Joined: Nov 2002
Posts: 1,073
NW, PA
grcelica
Specialist
2001 Toyota Celica GT
grcelica

Specialist
2001 Toyota Celica GT

Joined: Nov 2002
Posts: 1,073
NW, PA
uh,...wow. I thought all cars, domestic, and imported, have had EGR's since the early 70's? Maybe not, but I know on V8"s in the 70's it was merely a hose and valve that went between the valve cover gasket and the air cleaner and the exhaust manifold. If I had to bet I would say all our Celicas have EGR's, but like I said, not sure. QTRMILER's reasoning seems sound to me though!

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2000 Toyota Celica GT
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