hi guys,, i'm running a starlet GT,, recently i changed it for a straight through exhaust,, keeping the old muffler,, and yesterday i saw the woolen things pop out from the silencer (i think those are for the noise reduction)
and i feel the back pressure is gone,, car is running freely,, no more hesitates,,
guys all i want to know,, is it must that u have a back pressure on exhaust on any vehicle,, if it's not what are the cons,,?