I've been doing some searching for a throttle body for the 2002 Lexus GS300 with the 2JZ-GE engine, however, I couldn't find anything that isn't between 80mm-100mm which is to big because I'm not running a turbo.

Although I do have my own built airflow system built that makes my throttle response amazing with nano seconds in lag so that increases how quickly the gears change, and now I would like to actually increase the amount of air going into my engine.

Could someone guide me in a part that I could buy to allow more air through, or a way to allow my current 50mm throttle body to open up to about 60mm-65mm.

 

If you have a naturally aspirated GS300, you have a 2JZ-GE.

 

I just checked and you're absolutely right, I'm going to fix that. I have the 2JZ-GE engine.