whats the best Muffler & Exhaust combo for the VX?

[Ldub]

You could try a Supertrapp tip insert, which would allow you to fine tune backpressure by adjusting the number of discs.
I know they make one that fits the stock 3" tip, because I have one.
I think I got it from Summit, but not 100% on that.

[taylorRichie]

I had dual supertrapps on my ZR2.

I like them, they're highly tunable, both sound and performance. They are a bit pricey however, and depending on your setup they take a better than average muffler shop to do the install.

My setup was dual Trapps exiting through my Rollpan.

4.3 liter V6, Sound was pretty loud, based on how I tuned it. Performance wasn't great at first, but after a short break in period they really helped out.

[SilverBullet75]

In case anyone is interested...
I made a video of pics and sounds (video will make you sea-sick...sorry) of the Flowmaster Super40. It's almost 6 mins long.
VCross007 asked about part numbers for the Super40, which I don't have... so I threw this together. Hope this helps anyone interested in this exhaust setup!
http://www.youtube.com/watch?v=NDjHUm5pxf8

[pbkid]

just gotta throw in a little representation of PV2's.....

i like mine and i get compliments all the time about how it sounds...

powervault PV2....hard to get ahold of but a fun muffler....mine sounds a little strange at high RPM but who drives at high RPM on a regular basis anyhow? at normal driving speeds it has a great rumble to it....

the funny sounding muffler at high speeds could attribute that i chopped the exhaust shorter with a sawzall because i was sick of it catching on stuff when i was backing off