Hello all

my mate owns an EK civic also and he has a 2" system with hi flow cat and sports muffler on the back....

there seems to be a HOLLOW NOISE coming from the exhaust ???

you can hear the deep exhaust noise but in that noise there is a HOLLOW noise as well...

i took it to work put it on the host and i could see nothing wrong..
i tightended the gear shifter and the noise is still there ???

does anyone know what it is ??????