I'm thinking about changing my DC JDM 4-1 to a JDM Mugen 4-2-1 (Gymhkana spec).
I can get this header used at a very good price.

Is it better performance wise ? compared to the DC? I did search but didn't find any head to head comparison between them.

I'm doing this because the DC has very bad groung clearance on my car.

<<<---------Hoping that the Mugen 4-2-1 has better clearance than the JDM DC.

 

Moogen might have better clearence but from what I remember the DC JDM has more output.

 

If you want to upgrade from the DC JDM 4-1, I'd save for a true upgrade such as SMSP. The Mugen won't be worth the time or money, if you even expereience a performance improvement at all. As Rob said, the major improvement with the Mugen piece (in addition to very good build quality) would be ground clearance.

 

It depends how much it costs. Difference is prolly within 1 HP.

 

remember....jdm=mostly hype and not always HP

 

mugen is rated pretty good, so is the dc..my boy has the mugen and he had the DC, he said it pulls a little harder with the mugen

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EEK &raquo;</TD></TR><TR><TD CLASS="quote">my boy has the mugen and he had the DC, he said it pulls a little harder with the mugen</TD></TR></TABLE>

:rollseyes:

Thats real definitive....

I'd say unless you were planning bigger mods (cams, etc) then the difference probably isnt worth changing.

 

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

:rollseyes:

Thats real definitive....

I'd say unless you were planning bigger mods (cams, etc) then the difference probably isnt worth changing.</TD></TR></TABLE>

lol yeah what he said...my friend has ctr cams, 2.5inch exhaust, and cold air..he really didnt notice that much of a difference hahhahahhahha..sorry for not being as detailed lol

 

What's the price your looking at for the moooogen???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EEK &raquo;</TD></TR><TR><TD CLASS="quote">
my friend has ctr cams, 2.5inch exhaust, and cold air..he really didnt notice that much of a difference hahhahahhahha..sorry for not being as detailed lol</TD></TR></TABLE>

that's still not really detailed because it's all the butt dyno.

btw, <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .rj &raquo;</TD></TR><TR><TD CLASS="quote">I'd say unless you were planning bigger mods (cams, etc) then the difference probably isnt worth changing</TD></TR></TABLE>

i agree with what he said. also, i wouldn't go with the mugen. i'd go with toda or SMSP.

 

Is the mugen a 2.5" outlet? If it isn't why would you waste your time or money. A true upgrade would be a Toda, Hytech, or SMSP. Mugen is a bit over-rated in my book. Their exhaust is restrictive, their header does not create class leading power, and their valvetrain just seems to be rebadged OEM equipment. Not to mention all of their **** is overpriced. Mugen

Let the "Mugen is god" ppl comence flaming

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RGoose18 &raquo;</TD></TR><TR><TD CLASS="quote">Let the "Mugen is god" ppl comence flaming
</TD></TR></TABLE>

*shrug* gross overgeneralizations.

They make some very good parts - some more expensive than others - up to you to decide whether the performance increase is worth it. They do sell a 4-1 2.5" outlet header.

 

The DC 4-1 has a true 2.5" collector....the mugen 4-2-1 header does not, its 2.38" You'll possibly loose power by swapping to the 4-2-1. You may gain a little low-mid end power (a very small amount i would imagine!!) but will loose quite a bit top end.

 

i wouldnt rock it and i own alot of mugen bling, my jdm dc 4-1 fits my needs. The mugen front bumper is at the same ground height than the dc 4-1 anyways so if i want the header to clear the ground, the bumper definatly needs to clear it... so you wouldnt wanna **** up that bumper now would you? so no point in switching to the mugen for better ground clearence.. i'm with SMSP, hytech or Toda on this one also or keep the DC...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by [tk4L &raquo;</TD></TR><TR><TD CLASS="quote"> Doke]remember....jdm=mostly hype and not always HP</TD></TR></TABLE>

These generalizations are crap and I am getting sick of them really.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenracer &raquo;</TD></TR><TR><TD CLASS="quote">The DC 4-1 has a true 2.5" collector....the mugen 4-2-1 header does not, its 2.38"</TD></TR></TABLE>

Doesn't the Mugen 4-2-1 Gymhkana spec header has a 2.5" collector?

The one im interested in was bought new from Japan not from USA.

 

I'd keep the 4-1 if u like to QM or dragrace. The 4-1 produces more top end power while the 4 2 1 produces more low to mid power and would be more fun as a daily driver. I'm ignoring the size and the brand name with this post. I would spend that money on somen else bro like some good quality stickers which add 1 whp a piece.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type_r_jon &raquo;</TD></TR><TR><TD CLASS="quote">I'd keep the 4-1 if u like to QM or dragrace. </TD></TR></TABLE>

We dont have ANY tracks in Malta So the dragstrip is the only way to choose.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Euro98ITR &raquo;</TD></TR><TR><TD CLASS="quote">

Doesn't the Mugen 4-2-1 Gymhkana spec header has a 2.5" collector?

The one im interested in was bought new from Japan not from USA.</TD></TR></TABLE>

All mugen headers whether 4-1 or 4-2-1 have a 60.5mm (2.38") collector. the only reason its referred to as a 2.5" collector is possibly because 2.38" is a bit of a mouthful. Even the 98Spec ITR JDM header has a 2.38" collector, it has a double walled collector, the outer OD is 2.5" but the OD of the inner pipe which is what counts is 2.38". No header i know of made by any japanese company for a B18C has a true 2.5" collector, theyre all 2.38". Keep your DC...you get better gains from it

 

I have the mugen 4-2-1. I know it doesn't have a lot of top end the torque in the midrange probably is better than the DC.

Mugen 4-2-1 is the best header in my opinion.

Here are my results:
https://honda-tech.com/zerothread?id=188507

 

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

*shrug* gross overgeneralizations.

</TD></TR></TABLE>

How so?????

When comparing performance per dollar how can you say that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RGoose18 &raquo;</TD></TR><TR><TD CLASS="quote">When comparing performance per dollar how can you say that?</TD></TR></TABLE>

Because the more performace you want, the more it costs, i.e. exponentially.

 

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

Because the more performace you want, the more it costs, i.e. exponentially.</TD></TR></TABLE>

Exactly, that's my point, Mugen doesn't offer the amount of performance you'd expect for being one of the most expensive aftermarket parts companies out there. Their equipment's price is jacked up through the roof and the same amount of performance, if not better performance, can be attained for far less.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RGoose18 &raquo;</TD></TR><TR><TD CLASS="quote"> Their equipment's price is jacked up through the roof and the same amount of performance, if not better performance, can be attained for far less. </TD></TR></TABLE>

For some parts, yes for other parts no.

Many times you will get 90% there for 50% of the money and thats fine for most applications, but if you want that last 10% is going to be a lot more expensive than the first 90%.

 

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

For some parts, yes for other parts no.

Many times you will get 90% there for 50% of the money and thats fine for most applications, but if you want that last 10% is going to be a lot more expensive than the first 90%.</TD></TR></TABLE>

Point very well taken, but can you name any part made by mugen that falls within that category. (please don't say the mugen intake, because we all know that's a waste of money)