Any recommendation for Wira 1.5 auto? What to change?

Hi guys..

I have a perodua axia, im suffering from poor low end torque.. Accelerating 0-40 quite troublesome sometimes. Viva has better acceleration

I am currently using works drop in filter. Really help alot in acceleration but i feel much more can be done.

Im planning to remove the airbox and run an air duct from the front grill to the filter.. I also plan to wrap the extractors with thermal wrap because the air duct might be very close to the extractor, i dont want it to be heating up the air. My car really runs very smooth n nice during morning n late evenings. Or any weather that has temp below 30 degrees..

Currently running on stock rims... Maybe one day upgrade to 15" light Weight one.

For exhaust. I have zero knowledge... But i might wanna mod it soon as well. I dont mind a little bit of bassy sound, but not those really loud like racing cars, my neighbors will rape me.

Do you guys have other ideas that i can do to increase acceleration?

Thanks all sifu

just out of curiosity. is it possible to change from stock single muffler to dual muffler and at what cost? i.e. effect on performance etc.

ford focus mk3, still stock engine. i saw some aftermarket catback like J2 engineering with quad exhaust but apparently it's not available here. wanna do custom but afraid it will affect performance. i want to order the zetec s bodykit and it will look awkward with a single exit yet i really don't want to resort to ricing by putting dummy exhaust though.

Any advice or recommendation on any good exhaust shop