Hey Bud, I went and did to my VZ exec what you are about to do ur SV6. Lashed out hard, full stainless twin exhaust system, Pacemaker extractors, stainless highflow cats, right down to two offset stainless tips. To be honest i am actually a little wary, while it sounds like a pretty damn wild V6 the note (once you hit about 3300rpm onwards) seems to take on a buzzy kinda 4 cylinder buzz like a rampaging pintara or something (mates say it sounds like an F1 or a motorbike). Sure the system is flowing hard as and i would be guaranteed an EPA notice if i got busted under load and revs but on the other hand its nice and chunky when you cruise around and travel on cruise control, no drone at all from this system. Just that crazy buzz, but hey im willing to live with that for the rest of the perks.
If anyone reading this knows how to eliminate the buzz without losing the rest of the sound i would be all ears.
I scored this system FITTED for what u r looking to spend, drive away. All i did was shop around, the guy asked me not to tell my mates the price and i willingly agreed.
Just a bit of insight for you man, hope it helps.
Do the 2 hole airbox mod, add extractors and get new stainless mufflers my man, cats if cash permitts.
GOODLUCK!!