ITR JDM 4-1 Header on AUS ITR

[jre]

hi,
I need an opinion on putting JDM itr 4-1 headers onto an australian ITR? Would anyone advise of this upgrade?

thanks

[Vincikwan]

Yes..its a good upgrade. Go for it.

[jre]

ok thanks, i'll do that,
4-1 has higher range power right?

[90xsi]

ppl say you lose bottom end
but i didnt feel that i lost anything
the only problem is they hang very low
i scrap all over the place and im not even that low

[jre]

my cars not lowered so that wont be an issue. would i have much trouble fitting the headers onto the current stock exhaust? is there anything i need to also get with it in order to make it fit?

[Vincikwan]

yeah. the stock cat or audm is 2.25 inch. the header is 2.5 inch. So in other words, you have to either get a new cat or get a 2.5 flange to weld into the cat.

I wanted to get a 4-1 jdm header too, but i foung a spoon 4-2-1 header selling at $450. So i bought the spoon header. I am also going to do some custom work on the pipings and de-cat at the same time. But leaving the stock exhaust on.

[ITR#2313]

Yes..its a good upgrade. Go for it.

But only with a test pipe/metal catalytic converter and a 2.5 inch catback.

What kind of exhaust system has a AUDM ITR?

In germany,we have the small one with about ~1.8 inch diameter, header also.

[Vincikwan]

ITR with 1.8 inch? U serious?

[ITR#2313]

^^ yessur

About 1.8 inch diameter.
I search a pic of the EUDM exhaust system and post it here.

[jre]

But only with a test pipe/metal catalytic converter and a 2.5 inch catback.

What kind of exhaust system has a AUDM ITR?

In germany,we have the small one with about ~1.8 inch diameter, header also.

I think it wont be much of a difference considering that the german made is of a 1.8", but i think there will be some minor gains with the AUS ITR as it has a 2.25" exhuast. am i right?

[Vincikwan]

Yeah, aus dc2r has 2.25 inch 4-2-1 extractor. Jdm has 2.5 inch 4-1 extractor.

Based on a book i read with dyno proven results, the 4-1 jdm is heaps better than the 4-2-1 audm extractor. Bottom end is the same but high rpm the 4-1 is better. So the 4-1 jdm extractor does not lose bottom end. Dyno proven

[90xsi]

dont forget with the stock itr exhaust there is a bottle kneck right after the cat,
it goes down to about 2inch so maybe get an exhaust shop to chop it and weld 2.25
piping, otherwise just get a full custom 2.5 cat back
depends what you want and how far your budget can be stretched
Regards

[Vincikwan]

yup, that will be done as well.

[90xsi]

your laughing then =]

[Vincikwan]

Laughing at?