Question on JDM headers........

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Oct 21, 2001 | 10:56 PM

N1Spec

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Joined: Apr 2001

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From: Sydney, NSW, Australia

Question on JDM headers........

was wondering if anyone can tell wats the inside diamter of the primaries of a Spoon and a JDM header?

Oct 22, 2001 | 01:13 AM

ITR 99

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From: Perth, Australia, Australia

Re: Question on JDM headers........ (N1 Spec)

i asked a similar question about hytech headers a while ago, and the response
get f&*^ed
lets see if u get a diff response

Oct 22, 2001 | 04:10 AM

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From: Philly, PA, USA

Re: Question on JDM headers........ (N1 Spec)

about yea big:

Oct 22, 2001 | 04:25 AM

SMSP

Honda-Tech Member

Joined: Nov 2000

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From: Fredericksburg, VA, USA

Re: Question on JDM headers........ (N1 Spec)

Never cut up a JDM ITR header but the OD is 1.69" (43mm) however I don't know anyone who knows the gage of the tubing. Since it is OEM I would guess the wall thickness to be somewhere between 1.5mm and 2mm and probably closer to 2mm due to the weight of the header. So if you say 2mm then the ID is 39mm or 1.54".

I believe the spoon header has 45mm primaries as does the Mugen ad Toda but again don't know the wall thickness.