Here's the picture from the King web site as a point of reference.


The question everybody has about this exhaust system is, "how many versions are there for the Type R?" Some people are convinced that there are two types-one for USDM and another for the JDM.

a.) If you look at the image, the part number for the DC2(98-spec) is 18000-XG9R3S0.
b.) The part number listed on King's website is 18000-XG9R-K5S0.

Baby NSX believed that the pipe between the resonator and the catalytic converter was smaller on the USDM version. According to King, the ONLY difference between the USDM and JDM spec are...

c.) The length of the b-pipe and...
d.) The flange that connects to the catalytic converter.

Difference (a) is because the JDM catalytic converter is shorter than the USDM spec.

My question is, why is there a different flange?
What are the piping specs for the JDM catalytic converter? Are they the same as the 2.5" Carsound cat that a lot of vendors are selling?


[Modified by CPR, 3:37 PM 3/8/2002]

 

Let me restate my concern. If the difference between the JDM and USDM flange is the inlet diameter size (with the JDM being bigger), wouldn't it make more sense to

1.) Get a 2.5" carsound cat that has the same size (in terms of length) and flange specs as the JDM cat.
2.) Pair this up with the JDM spec Mugen Exhaust system?



[Modified by CPR, 4:07 PM 3/8/2002]

 

Yes that would make more sense. Unless you have no intention of doing more modifications on the car in which case the USDM exhaust would be fine (a 2.5" exhaust with everything else stock is not going to give you a lot of HP increase).

 

I put the answer to this in the other post. There using a centre pipe for the DB(4 door Integra) and the ITR/SiR twinloop muffler that could be bought by itself which is 60.5 mm or 2.38 inches through out. If I remember correctly the DB 98 spec chassis did not come out with twinloop muffler for it for sale by it's self.

 

So is King Motorsports feeding me crap? They were just telling me how much misinformation there is on the internet about the Mugen exhaust. Sigh...who to believe...

 

Don't believe King. I'm not a big fan of them so I might be biased.

 

lol, you actuallly believed them? man.........

 

The twin loop muffler that I saw at the header test had smaller tubing in between the passes thru the muffler.

 

You are correct, the tubing is only 2.00" that does the loop-de-doop.

 

Could been Civic twinloop..I've heard of King putting these on the DB piping as well.

As for King giving out misinformation they do it quite abit. Take for instance the CAI for ABS ITR's. They state it was designed for the North America. They didn't because anyone that knows the last two MY of ITR's came out with the Rx editions which becasically came from the factory fully loaded with only few options to choose from. One the std items was ABS and this is the reason they made the intake as a many customer asked for one for there Rx edition cars. So there not telling the truth on the site as they where orignally designed to work with all Rx ITR's and other ITR's with ABS option. I've found talking to alot of the dist. recently very few of them really don't know much about the products they sell.

I remember talking to King rep and then Scott the owner asking questions about the wording on the site and they said they never heard of Integra Type R Rx edition...and it probably somesortof made up internet hype.

 

I thought the USDM model also had a different tip?

 

Oh ok well the loop portion is smaller but the piping to it is should be 60.5mm.

 

yeah it does.. my friend had the JDM tip on his civic before it got jacked. and my other friend has the USDM tip on his integra.. there is a difference!! i'll try to get pix from them

 

Nah you can get different tip through Mugen of Japan it's just extra cash for the tip.
They did this for the muffler portion as options to the tips. If you ever seen orignal tips there pretty plan jane without any markings except for the logos.
You need 98 catolog to see it though as I don't believe it was listed in the newer ones for it..and Hyper Rev never printed on changes except for the entire exhaust sys.

 

So the next question is, how does one go about getting the JDM spec Mugen Exhaust?

 

Well just let me know as thats all I do now is import parts from Japanese and European companies for both Euro and Japanese cars.
If you want a complete JDM exhaust setup with 60.5mm through I can also help you with that as well.

 

I would not have cut up my Mugen exhaust if it were 60.5mm tip to tip. The fact is the USDM piece (the only piece that King will admit too) has a smaller diameter pipe between the resonator and the cat.

If King will not sell you the JDM system and that is the one you want then I would look for another source. I'm sure there are people who can get it in. I would try A&J racing, they seem to be able to get almost anything.

W.R.T. the twin loop itself and the diameter of piping: On the piece I am using I am positive that the diameter of ALL the piping is still 60.5mm. There is absolutely no way that any of it was 2”.

Besides the 2" pipe between the cat and the resonator, I could see nothing in the construction of the remainder of the system that could be called a bottleneck. In fact, the rest of the system looked pretty dam good! Perhaps it is true that King occasionally swaps in a civic twin loop when they sell the system? That is if the civic twin loop is actually constructed differently and would fit!

Regards,

 

I believe the loop portion is 60mm compared to the rest of the 60.5mm piping.

 

OK, OK, it might be 60.0mm not 60.5 like the rest but it sure ain't 2"

 

can anyone get the CTR mugen twin-loop catback?

 

Muuuuuuugan

Sorry post whoring, without a post count.

Bryan

 

Yeah 60mm-2.36inches and 60.5mm-2.38inches are pretty close and probably barely noticeable except to very keen eye.

I can get your CTR exhaust sys for EK9. They also have N1 CTR exhaust as well if they haven't stop making them in Japan yet.

 

I'm not sure if this is helpful in any way - but here are some old pics of my car with the Mugen system and a Spoon cat-jack








Here's a pic of the Mugen CAI (I don't have a/c on my car)





My Mugen system was all JDM spec as far as I know. The Spoon cat-jack came from A&J racing - and is the same length as the JDM catalytic converter.

The pictures with the ruler are misleading as I should have used Venier's calipers instead -- but the piping is about 62 mm


[Modified by BPR, 4:23 PM 3/8/2002]

 

Hey BPR, did you happen to measure the piping AFTER the resonator? If so, was there a difference is size?

 

Nice exhaust BPR...
I wonder where you got it?



Since that was my old exhaust.... here's my comments....

It's a JDM one..... and I've seen the USDM/JDM version....

The only difference is the midpipe length..PROVIDED YOU GET THE ONE THAT IS SPECIFIC TO THE ITR.

After the mobile home sized resonator...the pipes are 2.5inch or so all the way thru.... that is the reason WHY it will NOT bolt up to the stock Catback and the donut which is used on the midpipe to connect to the MUFFLER is the same size as the JDM header donuts.

Nice system...but a bit heavy for my tastes....