Can i have a flavor about mazda 2 exhaust system, what type of bullet system that use for mazda2... plz advise if i want to upgrade my exhaust systems....

 

Upgrade? For what reason? More noise?

 

For performance purpose, to increase power and saving fuel....
can i know what type original bullet that use for mazda2? it's a straight bullet or s type bullet??

 

A different exhaust will not even remotely gain you any fuel economy, and if there are any power gains, they will only come at max RPM at wide open throttle and will most likely come at the expense of mid-range power.

Long story short, save your money; if you want a higher power car, sell your car and buy a car with more power.