I have a 2007 g35x and was thinking of doing the muffler delete, hard to tell from videos online if it sounds good or not. I noticed in the videos that one is a g35s and the other is g35x, im not sure if that makes a difference but one sounds much better then the other.

https://www.youtube.com/watch?v=9VBIfUnihlg#action=share (good sound)

https://www.youtube.com/watch?v=Hb1YAq2jUWc (bad sound)

 

Just unbolt your muffler and drive around for a bit, if you like it head to a muffler shop and have them weld on new tips, if you don't like it, bolt the muffler back up.

IMO it sounds nice at WOT but terrible all other times.