hi...
it has happened to me b4 too...
there is nothing wrong with it but usually this happens when u rev it in neutral...
never encountered it when rev till redline in gears....
I wanna diy to connect the aluminium hose from the front of my bumper to my air filter.But i can't seem to be able to find the aluminium hose. I saw it once in kakimotor in subang but it cost about rm 50 for about 1...