Ya I notice that but I have a problem where my friend ncp 93 has quiter cabin noise compare to my. His car only make loud noise when rpm is over 3k. Mine is like between 1-2k rpm can hear the noise already very frustrating to drive around.

I had checked the exhaust system like
Exhaust Manafold
Catalytic converter
Center box resonator all is fine

Except for the muffler. They didn't check the muffler

But the weird thing is the sound is like come from the front of the car when I'm driving. But my engine noise sound fine when open the bonnet to inspect for exhaust manafold leak

Revving the engine on N or P does not create the rambling engine noise. Only when you drive the car.

I do take care of my maintenc. Spark plug oil change those etc

My car has very loud exhaust noise I think it's a bad muffler because I check with the Center box which is the resonator and the catalytic converter is fine. Now I need a silent muffler to make my whole exhaust system sound more refine and subtle to drive

Accelerating between 1-2.5k rpm unbearable

Vios 2011 ncp93 2nd facelifted everything is stock btw

Budget 300rm for muffler change

A good low noise muffler will be delightful to drive right guys ?

Has anyone has the noisy vios problem ?

Check for signs of leakage. Extractor maybe?