is the only difference the collector size? does the bigger collector really make that much of a differece? is spending the extra money on it worth it?

 

Bigger collector = Bigger HP gains.....Not much of a difference, 2-3, but the torque is 4-6ish with the 3".

 

neither one has a 3" collector...the jdm has a 2.5" and the quality is better (also larger primaries) and yes it is worth the extra money to get it

 

They bothe make about the same horse i havent really seen any differnce

 

DC is about a 100 dollars cheaper.

250 VS 350ish


with DC you get a ceramic coating and over all cleaner built header and will pick up a few extra hp over JDM OEM 4-1

as long as you go with the DC w/ 2.5" collector

the carb legal ones... are well... carb legal and wont make the power of the jdm 4-1 dc copy or the jdm 4-1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93hb &raquo;</TD></TR><TR><TD CLASS="quote">is the only difference the collector size?</TD></TR></TABLE>

Basically, yes. The primaries are the exact same size (at least on the ITR versions), though there are slight differences in the tubing configuration.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93hb &raquo;</TD></TR><TR><TD CLASS="quote">does the bigger collector really make that much of a differece?</TD></TR></TABLE>

Yes, especially when properly paired with a 2.5" high-flow cat, and especially when used on a modified motor.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93hb &raquo;</TD></TR><TR><TD CLASS="quote">is spending the extra money on it worth it?</TD></TR></TABLE>

Yes. You should be able to get the header itself for roughly the same price as the "USDM" version, although there is the added expense of the new high-flow cat.

 

[QUOTE=Padawan]

Basically, yes. The primaries are the exact same size (at least on the ITR versions), though there are slight differences in the tubing configuration.

no they aren't. i was at JRP (local parts distributor) a couple of weeks ago and the DC 4-1 and DC jdm 4-1 are different. the piping on the jdm header is bigger, its not just the collector that is larger. the standard DC 4-1 is designed for the b16 and the DC jdm 4-1 is designed for the ITR.

 

The two headers I have in my garage are. One is the "USDM" 4-1 ITR header, and the other is the "JDM" 4-1. Both have <u>identical</u> 1.75" primaries. It's possible that the B16 versions use smaller tubing, but for the ITR applications, both the USDM and JDM are the same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16vtecsol &raquo;</TD></TR><TR><TD CLASS="quote">neither one has a 3" collector...the jdm has a 2.5" and the quality is better (also larger primaries) and yes it is worth the extra money to get it</TD></TR></TABLE>

I thought the ITR header has 3" collector......?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zensoku207 &raquo;</TD></TR><TR><TD CLASS="quote">I thought the ITR header has 3" collector......? </TD></TR></TABLE>

The JDM ITR header has a 2.5" collector. The USDM header has a 2.0" collector.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">

The JDM ITR header has a 2.5" collector. The USDM header has a 2.0" collector. </TD></TR></TABLE>

oh werd, i knew there was a difference in there somewherre......


so what does DC have us and jdm headers too?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zensoku207 &raquo;</TD></TR><TR><TD CLASS="quote">

oh werd, i knew there was a difference in there somewherre......


so what does DC have us and jdm headers too?

</TD></TR></TABLE>

yes! you can get the DC copy of the JDM 4-1 w/ 2.5" collector that actually outperforms the JDM 4-1 OEM header.

Its cheaper (250 bux) and its ceramic coated. IT IS NOT CARB LEGAL THOUGH.

the 2" ones are carb legal.

 

JDM 98 ITR 4-1 isn't truely 2.5' outlet, it has a 2.5 collector though. The DC Sports has smooth runners(no bumps) after the flange and has a TRUE 2.5' outlet.

 

alright....thanks for the info.


where's the best place to get a DC jdm 4-1 stainless steel header?

import-palace.com has them on their website for 325.00

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by irev210 &raquo;</TD></TR><TR><TD CLASS="quote">IT IS NOT CARB LEGAL THOUGH.</TD></TR></TABLE>

Do you think this is the case because the DC JDM header will make your car run dirty? Of course not! That would actually make sense. The only thing that keeps it from being CARB legal is the fact that it won't bolt to a stock USDM cat without modification. In order to be CARB legal, it MUST bolt to the stock cat in the stock location without modification. So no header with a 2.5 inch collector can be CARB legal.

 

DC JDM 4-1. Best bang for the buck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">

Do you think this is the case because the DC JDM header will make your car run dirty? Of course not! That would actually make sense. The only thing that keeps it from being CARB legal is the fact that it won't bolt to a stock USDM cat without modification. In order to be CARB legal, it MUST bolt to the stock cat in the stock location without modification. So no header with a 2.5 inch collector can be CARB legal.</TD></TR></TABLE>

Yes, there was a discussion on h-t awhile back about why they arent carb legal. I explained why, as you stated, because they dont bolt to factory emissions equipment.

I didnt say anything about them being dirty or anything like that. I simply stated that they wernt carb legal.

 

do you guys really think its that good or is it the latest thing to have? Cause ive notice the import scene is very trendy... such as everyone was on the Skunk2 wagon now peeps are calling it Skank2.... Does that collector make the difference or primaries, maybe the overall design can some answer that for me?hmmm...

 

its just a better copy of the Honda 4-1

Look at dynos man... its the best bang for the buck header out there..

~$250 bucks
and performs slightly better then the JDM OEM 4-1

best bang for the buck header PERIOD.

I recommed to all my customers who are looking for a sub 800 dollar header to go with this one.

Ceramic if they dont care for bling
Stainless steel if they like bling or live in snowey area where rust is an issue.

Thats just me though. To each his own... fad or no fad... this is my "editors choice" for bang for the buck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by irev210 &raquo;</TD></TR><TR><TD CLASS="quote">Ceramic if they dont care for bling
Stainless steel if they like bling or live in snowey area where rust is an issue.</TD></TR></TABLE>

Keep in mind that DC's 'stainless' header actually uses mild steel flanges. So while the tubing won't rust, the flanges will. Because of this, I will NEVER buy a DC 'stainless' header until they go full stainless (which they should have a long time ago!).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by irev210 &raquo;</TD></TR><TR><TD CLASS="quote">
I recommed to all my customers who are looking for a sub 800 dollar header to go with this one.

</TD></TR></TABLE>

I dunno man, AN-R makes an impressive header for under 600 bills.

I do like DC though,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zensoku207 &raquo;</TD></TR><TR><TD CLASS="quote">

I dunno man, AN-R makes an impressive header for under 600 bills.

I do like DC though,

</TD></TR></TABLE>

Then again, the AN-R header is not a good fit in alot of cars. Also, it does not allow use of A/C.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">

Then again, the AN-R header is not a good fit in alot of cars. Also, it does not allow use of A/C.</TD></TR></TABLE>

sheeeit who needs AC anyway, it jus steals HP.

 

I was interested in the JDM DC 4-1 header. What exhaust is best recommended with the JDM header?

 

Any 2.5" mandrel bent system with a straight-through muffler should be a good match for the DC JDM 4-1.