I plan on upgrading my exhaust soon. I'm trying to of course increase flow, create a deeper sound, and have it not be so loud it's gives me a headache on long drives.
I basically want it to have a nice deep rumble without being annoying and raspy.
I only want to go cat or axle back. Any suggestions?

PS
would a cat back void warranty?

 

Cat back shouldnt void warrenty. For the type i would look into magnaflow. I know RRE sells them
http://www.roadraceengineering.com/4g.htm

 

I would be careful what you get. Call up the dealership that you got it from and ask before you buy that because every dealer has its own ways of doing things.

 

I am looking to do the same but looking at just getting a muffler that sounds good