H22 JDM 4th gen stainless manifold and downpipe

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:45 pm

nah no chance! my car was up on a ramp at the time and i REALLY Wanted it fitted so tried pretty much everything i could to get them to meet up but it was seriously impossible

Post by **NafemanNathan** » Mon May 14, 2012 1:45 pm

Merlin wrote:On my 4th I have a Fujitsubo mani (JDM), UKDM decat, and UKDM cat-back. As a result my exhaust pokes out a little too long. If I were to replace the UK decat with a smaller JDM decat (Im about to ) then my exhuast will fit properly. This is only possible if the manifolds & downpipes are the same for both UK & JDM. The size of the different CAT's must be made up in the center section.

So you're saying that you need to run a JDM cat because you're running a JDM downpipe, and then you can run a UKDM catback? And obviously you can run a UKDM downpipe with UKDM cat with a UKDM cat back, so this tells you that the whole catback exhaust (from the centre section to the backbox) between JDM and UKDM is the same length surely?!!!

Post by **NafemanNathan** » Mon May 14, 2012 1:48 pm

bristol_bb4 wrote:
grant_day wrote:What about the two bores on the JDM anFd ukdm downpipes? The jdm ones are further apart..
what do you mean mate?

You're on about where the primaries collect into two and then connects with the downpipe aren't you? Probably wise to always buy a mainfold/downpipe combo bud... Especially when it comes to custom/aftermarket.

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:49 pm

NafemanNathan wrote:
bristol_bb4 wrote:
grant_day wrote:What about the two bores on the JDM anFd ukdm downpipes? The jdm ones are further apart..
what do you mean mate?
You're on about where the primaries collect into two and then connects with the downpipe aren't you? Probably wise to always buy a mainfold/downpipe combo bud... Especially when it comes to custom/aftermarket.

yeh i thought thats what he meant, deffo dont buy them as separate pieces, thats just asking for trouble

Post by **Merlin** » Mon May 14, 2012 1:50 pm

NafemanNathan wrote:
Merlin wrote:On my 4th I have a Fujitsubo mani (JDM), UKDM decat, and UKDM cat-back. As a result my exhaust pokes out a little too long. If I were to replace the UK decat with a smaller JDM decat (Im about to ) then my exhuast will fit properly. This is only possible if the manifolds & downpipes are the same for both UK & JDM. The size of the different CAT's must be made up in the center section.
So you're saying that you need to run a JDM cat because you're running a JDM downpipe, and then you can run a UKDM catback? And obviously you can run a UKDM downpipe with UKDM cat with a UKDM cat back, so this tells you that the whole catback exhaust (from the centre section to the backbox) between JDM and UKDM is the same length surely?!!!

TBH I dont know what im saying now (im hungover) it seemed correct in my head as I was typing

. I was trying to apply 5th gen facts to 4th gens

My issue is length, using the UKDM decat results in the whole system being too long.

JDM manifold and down pipe
JDM or UKDM decat
Ebay Japspeed exhaust

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:52 pm

Merlin wrote:My issue is length

im with you on that one mate

this thread hurts my brain

Post by **NafemanNathan** » Mon May 14, 2012 1:53 pm

RICH OF PAW, I SUMMON YOU!!!

Post by **indigolemon** » Mon May 14, 2012 1:54 pm

Yeah, I'm out

Bring in the experts

grant_day · Post by **grant_day** » Mon May 14, 2012 2:02 pm

bristol_bb4 wrote:
NafemanNathan wrote:
bristol_bb4 wrote:
grant_day wrote:What about the two bores on the JDM anFd ukdm downpipes? The jdm ones are further apart..
what do you mean mate?
You're on about where the primaries collect into two and then connects with the downpipe aren't you? Probably wise to always buy a mainfold/downpipe combo bud... Especially when it comes to custom/aftermarket.
yeh i thought thats what he meant, deffo dont buy them as separate pieces, thats just asking for trouble

Exactly what I meant.
Cheers

Post by **Merlin** » Mon May 14, 2012 2:02 pm

Actually my argument falls down as I dont for sure know if my catback is JDM or UKDM fitment. Its probably UK

All we need is a one word answer. Downpipes or center sections?