Need some help with Exhust system.

The best aftermarket exhaust IMO is TTI from header to tail pipe.
I also like the Summit racing exhaust. But not there headers. Thee the typical garbage fitting headers you have now with 3 pipes under the steering linkage.
Doug’s headers would be header choice #2.

An X pipe is ever so slightly whiter than an H pipe.
A reasonably quite muffler is the DynoMax super turbo.

For stock, Accurate Exhaust is excellent.