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Intake Upgraded To Joe Z Direct Air Flow Intake (D-Afi)


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For those who might be aware, lexus offer a performance improving intake system for the IS250 called the The F-Sport High-Flow Air Intake. This system consists of slightly re-designed lower airbox, a re-usable dry filter, and a polished, clear-coated aluminum tube. It claims that the breathing, is improved. It uses the existing Lexus filter enclosure top, but replaces the bottom half with a specially designed and reshaped intake which produces a deeper, more powerful intake sound that varies with throttle applications and generates a small increase in rear wheel horsepower. Pictured below:

20092611155453778020.jpg

This kit costs around $400 plus shipping. and because of it's value, the import duty and VAT on it will be high.

So I decided to get the Polished Joe Z Direct Air Flow Intake (D-AFI) pipe instead. It is much cheaper at only $125. This pipe replaces the factory plastic tube of the stock intake system, fully utilizing the stock air box. The intake pipe inner surface has a smooth design that claims to give your oem system optimal air flow without any disruptions. It's also claimed that independent DYNO Test results on a stock manual 6 speed IS250 showed gains of 6+ Rwhp Max Power & 5.6+ ft.lbs of Peak Torque.

In order to get the deeper & more powerful intake sound that the F-Sport system provides, I decided to modify my stock lower airbox by making the extra opening that the F-Sport lower airbox has. The main difference between the F-Sport lower airbox and stock lower airbox is that the F-Sport one incorporates an additional opening drawing more air from the headlight area and giving a much better growl

Anyway, I have installed my Joe Z intake and modified my airbox. The installation was a breeze. I've had it installed for just over a week now and I must say I am very impressed. The car seems much more responsive and you do feel the kick. The deeper growl above 3500rpm is awesome. Initially i was thinking of upgrading my exhaust to get a better sound to match the rear IS-F conversion. The problem I faced with most of these exhausts is that the noise level increases at a lower rpm level and I didnt want this.

With this intake and airbox mod, I get a deeper growl when the car is pushed above 3500rpm. I will try and produce a sound clip or video sometime soon and post it.

There are alot of youtube videos comparing the sound. But what I noticed is that most of those videos are comparing the rev sound when the car is in PARK. These sounds are not actually the sound you get when driving. The growl sound is awesome when the car is actually being driven and air is being sucked into the intake.

Note: Tango was the first to do this mod :D

Here are some pics of the installed intake and airbox mod

Stock Intake Pipe removed:

LEXUS_IS250_JOEZ_006.jpg?1

Lower airbox drilled

LEXUS_IS250_JOEZ_001.jpg

Joe Z intake installed

LEXUS_IS250_JOEZ_002.jpg?1

LEXUS_IS250_JOEZ_003.jpg?1

LEXUS_IS250_JOEZ_004.jpg?1

LEXUS_IS250_JOEZ_005.jpg?1

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Note: Tango was the first to do this mod biggrin.gif

Here are some pics of the installed intake and airbox mod

Stock Intake Pipe removed:

Lower airbox drilled

LEXUS_IS250_JOEZ_001.jpg

Ahmed, please tell me that's a pic of the unfinished lower air box :o I'm sure the finished box looks like this :winky:: Did you also fit a free flow filter like the Blitz?

fsportairboxmodreg.jpg

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Ahmed, please tell me that's a pic of the unfinished lower air box :o I'm sure the finished box looks like this :winky:: Did you also fit a free flow filter like the Blitz?

Thats the only pic I remembered to take while modding it. I did eventually file it down and smoothen it all out :hehe: Dremel was out of order so had to use old fashion filing method. Took longer than expected :D

I put in a HKS Drop In Filter

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A couple of weeks with this intake and drilled airbox and I am really loving it even more. I can definately notice a better throttle response and better pickup. I am also loving the deep growl sound that it produces between 4k and 7k rpm. :)

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