is the only difference between them the 2.5 the collecter size? or are the ports on the runners from the JDM header bigger? TIA

 

anyone have an answer?

 

the jdm one has a 2.5" collector

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by delLudeVTEC &raquo;</TD></TR><TR><TD CLASS="quote">the jdm one has a 2.5" collector</TD></TR></TABLE>

yea, but anyhting else besides that? mainly the runners?

 

i always thought that the jdm header had larger primares, but i dunno

 

the DC Sports JDM 4-1 has lower cost, larger primaries, lack of inner welds at the flange, and better collector. The only benefit about the JDM ITR header is that it has better ground clearance and a heat shield.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicFerioViRs &raquo;</TD></TR><TR><TD CLASS="quote">the DC Sports JDM 4-1 has lower cost, larger primaries, lack of inner welds at the flange, and better collector. The only benefit about the JDM ITR header is that it has better ground clearance and a heat shield. </TD></TR></TABLE>

He's referring to the "JDM" and "USDM" versions of the DC Sports headers. When comparing the two (assuming they're both ITR versions), the primaries are the same diameter, it's just the collector that's larger.

By the way, why does your above post look so familiar...?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">From a performance and value perspective, the DC Sports JDM 4-1 has the edge with it's slightly lower cost, larger primaries, lack of inner welds at the flange, and better collector.</TD></TR></TABLE>

At least someone's been paying attention to my posts.

 

anyone else have a clue? im referring to the 4-1 header BTW

 

 

i think it has larger primaries too...

does it matter a lot if the collector is only 2.25" instead of the 2.5"? applciation is on b16a

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cx Son &raquo;</TD></TR><TR><TD CLASS="quote">anyone else have a clue? im referring to the 4-1 header BTW</TD></TR></TABLE>

What additional information are you looking for. The collector on the JDM version is 2.5" vs. 2.0" on the USDM versions. As I said, the tubing itself is the same size for both versions (if they're both ITR headers).

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cx Son &raquo;</TD></TR><TR><TD CLASS="quote">i think it has larger primaries too...

does it matter a lot if the collector is only 2.25" <FONT COLOR="red">(USDM is 2.0", not 2.25")</FONT> instead of the 2.5"? applciation is on b16a
</TD></TR></TABLE>

If you're comparing a USDM DC 4-1 made for the B16A application to the DC JDM 4-1, then the information I've read indicates that the tubing size of the primaries on the B16A header is a bit smaller. And yes, the JDM version will perform quite a bit better than the USDM version.