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GanzFlow Cold Air Intake

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Old Jul 6, 2004
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GanzFlow Cold Air Intake

I noticed that the Civic's stock airbox is similar to the location of the Subaru Impreza RS (non-Turbo version). I know this one intake made by Larry whos one of the hardcore AWD tuner.

Anyway, here's the quote from Larry's GanzFlow Intake System.

One of the advantages of this particular intake vs other intakes is that ours retains the stock airbox at the throttle body, which acts as an air-plenum or resevour of air for the engine. This serves two purposes - one is to absorb and eliminate intake pulse harmonics and improve the smoothness of the powerband and the other is as a ready supply of moving air to retain low end power when intake air velocity is lower.

The other big advantage of this intake vs others is that we supply cold air to the engine, not feeding the engine hot air from the engine bay. Why is this important? Simple, cold-air is more dense and contains more oxygen than hot air, so the engine can make more power when additional fuel is supplied automatically by the fuel injection system. It is said that every 40-60 degree drop in temperature will result in an additional 5-6% increase in power! That's as much as 10hp right there. There may also be gains from mild pressurizing the inner fender at higher speeds, and from the less restrictive intake tubing for more top end power
There are tons of positive feedback from www.i-club.com and imprezars.com members regarding this intake system.

For more info on this intake system, CLICK HERE including dyno plot.

Im know our Civic does not have a hole by the engine going to the underside of the fender. But if I can retain the stock airbox by the throttle body, that would be fine and closest to the set-up made by Larry...GanzFlow CAI.

Is there any manufacturer for our Civic that retains the stock airbox by the throttle body? If not, I might as well start fabricating one starting with a no-name intake from eBay and alter it a little bit.

Stock 04 LX:


GanzFlow CAI on an Impreza RS: (This Impreza has two airbox plastic like the 04 LX pic above.)
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Old Jul 6, 2004
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One of our member that goes by the name Callawaygirl has a set-up similar to GanzFlow.


Last edited by 518; Jul 6, 2004 at 10:13 PM.
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Old Jul 6, 2004
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interesting
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Old Jul 6, 2004
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Regarding the filter, I will replace it with AMSOIL foam filter. I've already installed one of the intake on my friend's Impreza RS last year.
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Old Jul 7, 2004
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Pics of Callawaygirl's car?

That Subaru has a side mounting intake. Ours comes in from the top.
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Old Jul 8, 2004
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Originally Posted by IronFist
Pics of Callawaygirl's car?

That Subaru has a side mounting intake. Ours comes in from the top.
NO. The reason you think ours comes with mounting on top is due to the fact that AEM, Injen, K&N eliminates the actual filterbox. With the GanzFlow set-up, the filterbox is left alone and the panel filter is upgraded to an AMSOIL foam filter.

Our Civic doesnt have the hole on the side going under the fender. So this is how Im going run the pipe.


Anyway, I just saw Callawaygirl's car and she doesnt have this anymore. She has the K&N now, she may have thought she was being ghetto with her previous set-up.
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Old Jul 8, 2004
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If you want, you could get some tubing and cutom mount the piping to the stock air box. It would be cheap and close to the wrx air box you are taking about.
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Old Jul 8, 2004
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isn't callawaygirl the person from thailand?

edit: she's from singapore.
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Old Jul 8, 2004
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You better reseach your filters carefully. Foam is the WORST filter media ever! Amsoil makes filters that are even poorer quality than K&N. The only aftermarket cone filter I would use is the one from Apexi power intake. Other than that, paper filters best.
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Old Jul 8, 2004
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Thank you for your concern gearbox, I really mean it.

But based on your post that can be found HERE regarding K&N Filter, I dont think I am convinced that K&N is way better than AMSOIL. I did a lot of research "K&N filter vs amsoil." The result was that a majority of Engineers who did a test on K&N Filter vs AMSOIL 2-Stage Foam Filter, favors the AMSOIL 2-Stage.

Could it be just a marketing scheme by AMSOIL? I am not certain. Whow knows, K&N could be doing the same thing.

K&N Bites the Dust

Another K&N Test

Remember you posted this?
Well lets just say the rag I used was black when I was done. I couldn't figure out how all that stuff had gotten there. Well guess what? I've been using a K&N OEM drop-in filter for over a year now. As I've been doing more research, I believe the K&N is to blame.

Paper air filters are able to do a much better job it seems of filtering air, at a cost of reduced airflow. Have you ever held a K&N up to the sun? Yeah-you can almost see the holes in it. Truth is the K&N is unable to filter very fine particles. Even microscopic dust particles are capable of doing damage to your engine over time.
It's more than likely that K&N's hard rubber seal contributed largely to cause the significant dirt build-up into your engine.

AMSOIL 2-Stage:
The flexible polyurethane foam of AMSOIL air filters provides a consistent, tight seal between filter and housing. Unlike conventional filters, which often fail to seal properly due to their hard rubber seal, the foam of AMSOIL air filters conforms to irregularities on the bottom and top of the housing, forming a tight seal when the housing is secured. Intake air must go through the filter before reaching the engine.
Lastly, I'm only looking into a drop-in filter and not the cone-type. But I never had any problem with my Cone-Type 2-Stage Foam Filter SRI on my WRX either.

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Old Jul 9, 2004
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Originally Posted by 518
NO. The reason you think ours comes with mounting on top is due to the fact that AEM, Injen, K&N eliminates the actual filterbox. With the GanzFlow set-up, the filterbox is left alone and the panel filter is upgraded to an AMSOIL foam filter.

Our Civic doesnt have the hole on the side going under the fender. So this is how Im going run the pipe.


Anyway, I just saw Callawaygirl's car and she doesnt have this anymore. She has the K&N now, she may have thought she was being ghetto with her previous set-up.

You can go to the side like that if you keep the stock filter box on otherwise the throttle body points up.
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Old Jul 9, 2004
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Originally Posted by Master
You can go to the side like that if you keep the stock filter box on otherwise the throttle body points up.

Thats what I intend to do. The whole idea is to keep the airbox. Impreza RS has the same TB, pointed upwards.

But Im leaning on not getting a pipe anymore. I might just get an aftermarket filter.
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Old Aug 3, 2004
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Is Callawaygirl still around?
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Old Aug 10, 2004
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So has anyone tried this? Where can we get good tubing that won't heat up too much?
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Old Aug 10, 2004
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tubes.com or sumthing like that buddie

Last edited by FuzzBeC00L; Aug 10, 2004 at 02:33 PM.
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Old Aug 10, 2004
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I may just shave some of the internal parts of the resonator.

I originally planned on getting the mandrel bents from this site:

http://www.roadraceengineering.com/mandrelbends.htm
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Old Aug 10, 2004
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I don't think metal will be any better than a regular intake. Too much heat absorption. Plastic or rubber would be better.
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