Hello.
I have a 05 Acura TL and is it possible to make the car exhaust louder by just changing the muffler instead of add a whole new $1000 system? If so can someone please link me thanks! I'm not looking for a ricer like sound something that's sounds nice

 

head to an exhaust shop.
Ask them to cut out the mid-muffler, and add a straight pipe.

this will net you sound for about $60

 

Lots and lots and lots and lots of exhaust threads in here already with many many many many suggestions. Everyone has a different opinion on what sounds nice and what sounds rice, so research it up and start changing it up till you find what works for you.