hi everyone..
i'm riding s4 vtec3 with Yoshi tri-oval titanium blue full sys. i just wondering when my vtec open the sound not louder.. compared with my frend riding s4 vtec2 using Yoshi tri-oval titanium blue full sys he's Yoshi much more louder than my Yoshi.. i mean when my vtec open not as loud as my frend pipe.
anybody here can help me 2 solve this problem..?????
pls help me guys.. thanks alots..