Dropping my car off at VAP this week. Headers and powerpack are on the menu, but not confirmed. I can report back.

 

I have a GT4 Airbox Delete, Secondary Cat Delete X-Pipe, and Factory Muffler with Fuse 22 pulled.

To me, that's the perfect sound and volume.

Pulling the fuse keeps the volume at a "nice" level that enthusiasts will appreciate and normal people won't hate. Then the X-Pipe, since it replaces the secondary cat section, slightly increases the volume but mainly makes a massive difference in tone....the normal Aston low rumble is now accompanied by a mid/high exotic tone, it's really cool.

The "cold air intake" (airbox delete) adds a lot of nice V12 induction noise...honestly, it reminds me of my E46 M3 CSL.

All together, it's perfect. Taste is subjective, but I never liked the super high pitched equal length header noise, this isn't meant to be a Ferrari. This gives you a more exotic sound while keeping it very Aston unique, and has an appropriately loud volume without being obnoxious.

 

I just did mine. Headers, Secondary cat delete, VAP Valved exhaust and it has a trumpet sound at 3500k. I'm trying to smooth it out. I put the factory secondary cat back in and it muffled it too much and sounds like stock. I have the CC Charger coming and will try it this weekend. Fuse 22 is back in and put as much deadening in as I can. I love the sound over 4500k, just not below... I have a 2011 V12 vantage manual. 3/4 throttle up to redline easing in sounds incredible!!!

 

my exhaust has an X pipe in it. Add a second X pipe?