Airflow of stock airbox is quite restricted. Thus, thinking of how to improve the airflow. Found out this website which basically modifying the stock airbox by removing all the pipings before the airbox and cut the airbox to make bigger hole for easier air suction.
URL: http://www.blytz.addr.com/howto/stockbox.html
I did mine similar to the website...
Result is lighter rev but noisier (sounds like open pod).
However, there're several issues for this mod:
1) Heat from engine (need proper heatshield).
2) Possibility of water entering air filter.
3) Noise (loud air suction sound).
FYI, i'm using stock Proton air filter and i'm not cutting my original airbox. Went to chop shop to get another airbox and cut it... i keep the original airbox :P
1st pic:
URL: http://www.blytz.addr.com/howto/stockbox.html
I did mine similar to the website...
Result is lighter rev but noisier (sounds like open pod).
However, there're several issues for this mod:
1) Heat from engine (need proper heatshield).
2) Possibility of water entering air filter.
3) Noise (loud air suction sound).
FYI, i'm using stock Proton air filter and i'm not cutting my original airbox. Went to chop shop to get another airbox and cut it... i keep the original airbox :P
1st pic: