Has any one try to replce the stock GS4 air filter with TRD or K&N? I am debating if I want to remove the housing to install a Cone? Or replace Air Filter?
Air Filter replace ($35 for KN, $60 for TRD).

For the Cone, I saw the new release KN 57-9011 Fuel Injection Kit without the ECU ~$360. The Swift Reacing's HFI/ECU $795.

I read review (www.super-lexus.com) that without the new ECU that I might hear ping. Is that true? What is Ping anyway... Can someone help me to explain..

 

hey, i am owner of super-lexus.com and i think it would be best for you get the new intake, it uses the stock MAF like RMM and it works well, i have it on my GS3 and now pinging yet.

it is made by Weapon*R and costs only 200. if you want the SRT product i think thier price has gone down to 600.

there are also other options for ECU since i updated my site, sorry

Apex'i S-AFC and Weapon*R intake makes the most power, and is about 600 all together.

 

Interesting article for all the newcomers to the forum.. and some of us old ones too.

http://www.gtrowner.com/induction.html

Read closely the conclusion... It's truly a toss up in horse power gains and looks. Now filtration is another subject.


The Ikon

 

VERY interesting - thanks for the link.

 

I have the same K&N also and love it, I could have found it a little cheaper on ebay, but I wanted a valid warranty so I got it at here. K&N 57-9011, or you can try one of the vendors on the forum here, you can usually find a good deal that way as well. This was very easy to install and I love it.