My JDM CR-Z Mugen AirBox just arrived today,
hopefully I can install this soon.

It basically DOUBLE the Filter area of the CR-Z AirBox that I currently
had on my Honda Fit.

It will also connect to the CR-Z OEM Snorkel to inhale cold air from
near the grill.

It came with K&N Air Filter.

I bought this because I plan to tune it TOGETHER with the Sprintex Supercharger so I don't have to retune it later.
Now, I really need to save money to get Sprintex...


The Box:






Very Nice Packaging:




All Parts:



Beautiful Carbon Fiber:




Came with Mugen Sticker for the Carbon Fiber Cover:




It have internal Velocity Stack???





The Airbox from FRP:




K&N Air Filter which basically have double the length of standard CR-Z filter:



For comparison purpose,
this the the OEM Stock CR-Z AirBox with K&N filter that currently
installed on my car (and will be for sale soon )
Notice the different in Air Filter size:



Another pictures of the AirBox (FRP):





Now, I hope there is no surprise and I can install this Mugen AirBox
without any modification to the Honda Fit...
We will know by next week when I have my day off and time to install them

 

cha ching! santa's gonna be broke this christmas!

 

Interesting looking intake.

 

very nice. i didnt know mugen made this for the CRZ. looking forward to seeing it installed

 

Absolutely love this!

 

Very interesting project. Tagging for interest.

 

my god that is a well planned out intake. Can't wait to see it feeding a sprintex.

 

I like! I wonder if using the crz intake is better than my K&N short ram.

 

What do you mean by better?

 

Any sort of measurable performance versus the k&n on the dyno. I would like a intake that makes whatever power improvement and doesn't ingest hot air. I want to say the crz intake would be better in hotter climates. I have no idea though. I've only owned this car for a month.

 

I wonder why the carbon fiber part is just a beauty cover? It should be the lid of the unit.
But it looks a lot like the stock one on my 330 BMW.. interesting..

 

its cheaper to mold a "beautiful" cover from carbon fiber rather than integrate it into a structural air box.

 

Function +

 

I plan to install this tomorrow, will update here

 

this... very well designed

 

I just install The AirBox:

Start by taking out the Air Sensor and then the rest of the AirBox:



Moving all the Rubber Pieces from the OEM CR-Z Airbox to The Mugen,
and applying some silicone lubricant to make it easier for the rubber
to slide into the holes on The Mugen AirBox:





Before installing the Air Sensor
have to install 2 bolts below where the air sensor suppose to go.
apparently this AirBox was designed by Mugen with something
different for the Air Sensor... so there is 2 holes that
need to be plug by 2 bolts that don't really hold anything,
just plug the holes,
and I point it with my finger:




All Rubber Parts and Air Sensor Installed:



Side by side comparison between the OEM K&N Air Filter vs.
The Mugen K&N Air Filter, exactly double the size:



With this airbox, you got to install the air filter, the upper cover
and the carbon fiber cover OUTSIDE the engine bay,
cause once it is inside the engine bay, you don't have space
to install the carbon fiber cover or the airbox cover...
yes... the space is tight...:




Problem with using CR-Z Airbox is,
the battery really tight with the airbox,
infact to remove or install the airbox, the
battery need to be remove,
for sure there is noway to use the 51R battery,
have to use the original size battery...
even that still tight...
and this Mugen Airbox is tighter then the CR-Z airbox in relation to
the battery,
I will need to trim it later when I install it with Sprintex Supercharger

Oh, did I mention, I just ordered the Sprintex and paid it today ?
Hopefully it arrive soon...

The bolts were not aligned too so I just use tie lock and
on the right side it don't even have any bolts, but it is resting
on top of the bracket so it aint going anywhere,
I just need to get longer bolt soon...







so after plug back the Air Sensor Electric Socket,
and tightened the connection to the intake hose and throttle body
and also plug in the Crankase breather...
I then clean the carbon fiber cover with alcohol
and apply the included MUGEN Sticker...

I start the car and it sound quiet..
I am too tired to test drive and going to have lunch first.

will report back later after I test drive the car tonight...

Here is after installed...
hmmm... It do looks nice hahaha

 

Good work. Looks great and congrats on the Sprintex order! Did the get the RDX injectors? Are you going to use Ktuner for engine management ?

 

Hi FamilyWagon,

Thanks,
and Yes, I actually ordered RDX Injector early in the morning yesterday
before I order the Sprintex... I took advantage of Bernardi Honda and Acura Free Shipping sales...

Well, I wasn't planning on buying the Sprintex until I saw GREAT TIPS from JibberJabbs at Sprintex Thread about the great discount on Sprintex Kit,
and I can't hold it anymore, hahaha...

I am still undecided whether to use AEM F/IC-6 or KTuner...
I already contact KTuner to get more info and he had replied...
I also already contact TurboGixxer and VitViper,
but both of them have not respond... (well this is ThanksGiving hahaha)...

I also contact another poster here that use AEM about possibility
of me buying his base map so I can drive the car with AEM to be dynotune...

so I am still undecided...

Oh, back to the Mugen Intake...

So on the first test drive...
It was scary because the car is shutting down every few seconds...
turn out, the positive battery went loose because
the Mugen AirBox were touching... well not just touching but
really pressing the battery terminal and push it loose...
luckily I manage to limp home... (it happened on the freeway near my home)...

back to drawing board...
I take out the Mugen AirBox and grind the part of Airbox that touch
the positive battery terminal... oh I also grind the left side mounting
to allow the airbox to move closer to the engine and further from the
positive battery terminal...
it is quite scary to dremel the carbon fiber... I worry I might scratch it...
well I manage to do it safely

here are the pictures:














then install everything back
and TEST DRIVE AGAIN

 

u are a brave man to dremel a perfectly fine carbon piece. now your job is not done breaking into the carbon fiber weave. u need to get some clear coat epoxy resin and you need to wet the exposed fibers to reseal them. otherwise moisture will get inside the fabric and destroy your mugen piece.

 

Ok, The second test drive is AMAZING...

The CR-Z Airbox (with K&N) was better than the Fit Airbox in term of
immediate response from lower rpm to mid rpm and feel about the same at high rpm.
The CR-Z Airbox also manage to maintain lower intake temperature compare
to Fit Airbox, I notice this because I use Scangauge full time and set the gauge
to intake temperatur... I guess the CR-Z Airbox had the advantage of
that snorkel intake near the grill compare to Fit who had to inhale air from inside
the engine compartment...

Now the Mugen AirBox...
it had even better response at low rpm compare to OEM CR-Z,
torque fell solid at mid rpm,
and at freeway speed over 50mph, it feel like it had the RAM AIR EFFECT !!!
I guess that snorkel combine with the much larger K&N filter inside the Mugen allow it to have little RAM Air Effect...

oh don't forget the design of Mugen Airbox is much more direct without
the labyrinth of factory Honda...

Now, what is STRANGE is the INTAKE NOISE of the Mugen is actually MUCH LOWER/Quiter compare to the CR-Z Airbox with K&N air filter...

on the other hand,
on the over run, my car now had that little back fire sound hahaha
yes, exciting... back fire when I abruptly rev the throttle and close it again...

Can't wait to get my custom 2 1/4 exhaust installed
I already had the OEM Civic Si Resonator and Muffler since few months ago...
Just don't have time to go to custom exhaust shop yet...

Once that done,
then I can decide KTuner or AEM F/IC-6 and then
install the Sprintex...