For the last 2 weeks now, I've been waiting for my twin loop to come. I called King today, they got the order from Japan and I should be getting it this week or the following.
Since then, I've been reading a lot of posts that Mugen offers different styles of the twin loop. The JDM on and the USDM one. I plan on running a JDM 4-1 and a T1R test pipe. I called up King today to find out what exhaust they have down I ordered and it was the USDM version. It's very hard to get information from them, you ask them a few questions and then they tell you something else. If I end up getting the USDM version style twin-loop, how do I get it to connect to the 2.5" T1R test pipe and JDM 4-1 header? Oh and they told me the only difference between the JDM and USDM version is just the flange. Hopefully they have the JDM version in so I don't have to cut up the exhaust just to get it to fit right. Anyways any info would be appreciated.

 

jon i have no f'n idea haha. i'm surprised no one answered this yet for you. i guess you can always find out once it gets here lol. You better take out that car and let me hear some mugen exhaust foo

 

I did a bunch of research on this exact topic before ordering my setup.
There is a JDM Mugen twin loop and a USDM twin loop.
On my setup I have a Mugen 4-1 JDM Spec Header and a Kakimoto JDM Testpipe made for the 2.5" collector, which is an exact copy of the JDM cat, and a JDM Mugen Twin loop. My setup bolts up without any welding or fabrication.
The JDM ITR exhaust is about 4.5" longer than the USDM one, towards the cat end. The JDM ITR cats are shorter than USDM cats. If your T1R test pipe is for a JDM DC2 and you have a JDM 4-1 Header you will need to make a test pipe that is about 4.5" to connect the USDM Mugen Exhaust. That is the extent of my JDM vs. USDM exhaust knowledge. Good Luck

Side note: Did you guys know that King sometimes cuts the large collectors off of the ITR exhaust manifolds and welds small USDM ones on them.


Modified by 98 Spec R at 6:44 AM 9/21/2005

 

Modified by JDM Factor at 2:38 PM 9/21/2005

 

I'm going to call King tomorrow to see if they have the JDM version in, otherwise If I save up some cash I'm gonna go with the RMF header where a flex pipe is needed and I'd have to configure the flange anyways...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM Factor &raquo;</TD></TR><TR><TD CLASS="quote"> Who sells the JDM version, that's in stock if King doesn't have it? </TD></TR></TABLE>

I special ordered the JDM ITR Exhaust from King Motorsports. I told them exactly what I wanted and they were very helpful.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM Factor &raquo;</TD></TR><TR><TD CLASS="quote"> Im suprised no one else has this prob.. or it's probably they just don't giva Sh*t. </TD></TR></TABLE>

They probably dont realize the difference until its too late and then they dont giva sh*t.

 

Mark good news, I found out how to resolve the issue! Instead of going through the hassle trying to find a test pipe that will bolt up etc, I'm just going to blow MORE money and get an RMF narrow header where I have to go get the flex pipe welded in anyway and be done with the hole thing! It's funny but yet true, the more money you spend, the better it gets.

 

I'm curious to see this setup you speak of. I'll be down at sebring before the end of the year.

 

The difference between the JDM version and USDM version has been discussed before, as 98 Spec R stated the difference is in the catalytic lenght with the US having longer cats, Japan having shorter cats, so the rest of the exahust also has to make up for it.

Personally I think itd be easier to deal with the USDM stuff, its a what 17.5" length cat, and you're done.

 

Very true, I told them just to go ahead with the order, and I'll deal with having a custom test pipe made after the flex-pipe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM Factor &raquo;</TD></TR><TR><TD CLASS="quote">I'm starting to get pissed at Kings shitty customer info and the shady misinformation crap.</TD></TR></TABLE>

Shitty and shady? Come on buddy - we answered 8 emails in the last day for you on the subject. The issue was that your requirements were changing all along. The first email you sent you asked if the exhaust you ordered would "bolt-up to a stock USDM Type R."

As we told you, if you want to run a JDM header all you have to do is buy an Omni Power test pipe and it will take up the necessary length and accomdate the two different flange sizes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98 Spec R &raquo;</TD></TR><TR><TD CLASS="quote">Side note: Did you guys know that King sometimes cuts the large collectors off of the ITR exhaust manifolds and welds small USDM ones on them. </TD></TR></TABLE>

That's 100% totally untrue!

 

Clayton, sometimes you just can't please everyone.
Especially when they don't know what they want (or expect) to begin with.

 

Everything is fine, Scott and I resolved the issues that I was having with the two different exhaust systems King offers. As far as knowing what exhaust your buying, Scott also changed the description on Kings website.

 

I was gonna say, I've never heard anything bad about King Motorsports, so I found these allegations somewhat hard to believe.

 

Yeah, I made a trip up to King this summer, m00gen heaven! OMFG! Super nice CEO too, gave us a little tour

 

I took down the bashing post, yesterday wasn't a good day! I kept reading a bunch of search topics and got caught up in everyone's bitching. I'll be honest I assumed whatever everyone else thought, I'd base my decision off of the topics. I want to apologize to everyone at King, you guys still got my exhaust in and I appreciate that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ausmith &raquo;</TD></TR><TR><TD CLASS="quote">

That's 100% totally untrue!</TD></TR></TABLE>

So I guess Mugen makes the smaller collector header for the USDM ITR Stock? I am sorry about the mixup on that!

I have always thought King Motorsports is a top notch company.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98 Spec R &raquo;</TD></TR><TR><TD CLASS="quote">

So I guess Mugen makes the smaller collector header for the USDM ITR Stock? .</TD></TR></TABLE>

Correct. They also make a USDM specific exhaust.

The only Mugen part we have to modify is the Prelude exhaust. We shorten it and slot the flange to fit the US Spec header. If you ever had any concern about our ability to do that I can post a picture of the jig, the NC machine that mills the flange, and show you countless pictures of our TIG welding capability.

 

King does beautiful work I have seen it before!

Oh yeah by the way its not a jig its a fixture. A jig guides a tool and a fixture holds the part for the mfg. operation. I know its just semantics but I had to correct you.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98 Spec R &raquo;</TD></TR><TR><TD CLASS="quote">Oh yeah by the way its not a jig its a fixture. A jig guides a tool and a fixture holds the part for the mfg. operation. I know its just semantics but I had to correct you. </TD></TR></TABLE>

Thanks