So I drilled
#1
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
After looking at the pix of the F-Sport intake air box, I decided to drilled 16 holes on my OEM air box to work with the JoeZ pipe.
First thing I notice, the gas pedal is lighter, after that starting from 3500+RPM I hear a deeper sound...It is really nice sound![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
I am going to watch for my avg. MPG now, maybe I am going to get a little bit less now...
Let me know what do you guys think? Should I drill more make it 20 for more air.
First thing I notice, the gas pedal is lighter, after that starting from 3500+RPM I hear a deeper sound...It is really nice sound
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
I am going to watch for my avg. MPG now, maybe I am going to get a little bit less now...
Let me know what do you guys think? Should I drill more make it 20 for more air.
#5
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Removing the carbon filter shows a 1 hp loss consistently. Ask caymandive.
Airflow is neither intuitive nor obvious.
Airflow is neither intuitive nor obvious.
#6
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Y'all realize that you could be hurting performance, don't ya?
The existence of all those fins in the airbox means Lexus did the requisite R&D/bench flow testing and decided to put those fins there for a reason. Sorry to be such a buzz kill but by drilling all those holes in the box, you may have negated all of that.
The existence of all those fins in the airbox means Lexus did the requisite R&D/bench flow testing and decided to put those fins there for a reason. Sorry to be such a buzz kill but by drilling all those holes in the box, you may have negated all of that.
Trending Topics
#8
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Y'all realize that you could be hurting performance, don't ya?
The existence of all those fins in the airbox means Lexus did the requisite R&D/bench flow testing and decided to put those fins there for a reason. Sorry to be such a buzz kill but by drilling all those holes in the box, you may have negated all of that.
The existence of all those fins in the airbox means Lexus did the requisite R&D/bench flow testing and decided to put those fins there for a reason. Sorry to be such a buzz kill but by drilling all those holes in the box, you may have negated all of that.
#9
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
If it does, and I agree with you that Lexus does their homework, then the holes are probably most effective without the fins. Therefore, leave the stock airbox alone or drill holes and shave the fins down. Correct?
#14
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Has anyone actually measured a performance gain from the F-Sport airbox? I'd want to know that before I drilled any holes.