Hi KWeng84,

I'd like to make my Persona AT pickup faster & better fuel economy. I do not care about top speed but I do care about the exhaust noise. I want the loudness to be as close to original as possible.

Is the configuration below good enough? How much does it cost?
4-2-1 extractor + midbox + twisted bullet + my original muffler

Please feel free to suggest an alternative setup.

Btw, after modding, will the car pass JPJ test when I want to sell the car?

Where in Puchong is your shop located?

Thanks.