H22 JDM 4th gen stainless manifold and downpipe

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:21 pm

ill have a fujitsubo for sale soonish

Post by **NafemanNathan** » Mon May 14, 2012 1:27 pm

grant_day wrote:I know the gain claims are absolute tosh but I would have hopes they knew what they're product will and won't fit?

Sorry I won't guess anymore haha, I know this is a topic that can go on forever regarding fitment etc so I'm just going to keep hunting for a mani and downpipe that says it will fit. If it won't fit I can then.send it back

Like I said near the start I believe all catbacks are the same length. The variable is the downpipe and the cat. So if you have a JDM downpipe, you need a JDM Cat/decat. If you have a UKDM downpipe, you need a UKDM cat. If you fit interracial downpipes and cats, depending on which way around you go, your connection to the catback exhaust will either be too far forward or too far back, meaning your catback will miss all the exhaust hangers and either be lost under the back bumper or stick out too far.

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:30 pm

NafemanNathan wrote:Like I said near the start I believe all catbacks are the same length. The variable is the downpipe and the cat. So if you have a JDM downpipe, you need a JDM Cat/decat. If you have a UKDM downpipe, you need a UKDM cat. If you fit interracial downpipes and cats, depending on which way around you go, your connection to the catback exhaust will either be too far forward or too far back, meaning your catback will miss all the exhaust hangers and either be lost under the back bumper or stick out too far.

duuuude thats not right though

i bought a catback from rob (ukdm) tried to fit it to my car (JDM) and it was too short because ukdm cars have longer cats

so i then also bought his UKDM decat and it bolted up no problems other than having to extend the 3 holes

ukdm catbacks are shorter than jdm ones FACT

ukdm cats are longer than jdm cats

downpipes are identical other than the slight offset stud pattern

manifolds are absolutely identical

Post by **4thgenphil** » Mon May 14, 2012 1:31 pm

oh nafeman, even nitin knows your wrong!

Post by **Merlin** » Mon May 14, 2012 1:36 pm

From knowing what parts I have installed on my 4th I concluded that the difference is in the center section.

Its a fact that 5th gens have different length downpipes and CATs but the difference is made up in the length of the center section.

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.

Since this is true for the 5th I would like to think its the exact same for the 4th.

Edit -bristol_bb4 basically said the same thing while I was typing this

grant_day · Post by **grant_day** » Mon May 14, 2012 1:39 pm

What about the two bores on the JDM anFd ukdm downpipes? The jdm ones are further apart..

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:40 pm

have you been under your car and looked at how your exhaust is fitted merlin?

on mine, no way in hell would the ukdm catback fit with my jdm cat fitted, the gap between them was WAY too big

bristol_bb4 · Post by **bristol_bb4** » Mon May 14, 2012 1:40 pm

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?

Post by **Merlin** » Mon May 14, 2012 1:43 pm

bristol_bb4 wrote:have you been under your car and looked at how your exhaust is fitted merlin?

Yeah as I fitted it myself

Couldnt you pull the whole cat-back back towards the engine? I'm positive that the JDM decat will fit my car as we had to push the whole exhaust down the car just to make the UKDM decat fit. It was easy to see that the UKDM decat wasnt the correct one to use.

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

Bollocks, have I got it the wrong way round on the cats? Sorry chaps - been a while since I played with exhausts

Damnit Honda - why didn't you just make them all the same?!