I working on getting the whole cat back done. What would be the best muffler to have(I like em loud)?

And also I think my pcm may have been programmed before I bought it because it shifts at 6200 rpm and it seems to run better than some of the other ones I test drove is there any way to find out?

 

If you like loud. go borla adjustable or SLP loudmouth. Its a full cat back exhaust and they flow awesome as well.

Edit: your tachometer is most likely just off by a little(most are). I think they shift at 5800 stock. then again they could have raised the shift point.

The only way you will truly know is if you hook it up on a computer and see where its set.