to redirect the exhaust flow from the original flow to shorter exhaust flow.
So , like using straight piping without muffler la after the valve open coz the air will go through the new hole.
HI ! SIFU AND DAIKO.
SAW ONE MODEL SELL AT MUDAH.MY ,THE LINK IS http://www.mudah.my/Toyota+Altezza-12944024.htm
ANYBODY KNOW ABOUT THIS MODEL IS IT TRUE THE MODEL,WITH MANUAL TRANSMISION ?
THIS MODEL SAME WITH...