quick muffler question

is the flowmaster 40 series muffler a 2 chamber or 3 chamber muffler? what about the 50 series? a local garage told me a 3 chambered muffler would be best for my 4.3L v6. what would be the difference if i put a 2 chamber or 3 chamber muffler? i want power, but i want it to be loud too.

Somone correct me if I'm wrong but....
40 series-2 chamber-very loud and deep
50 series-3 chamber-loud and deep
would think the 40 would give you more power having less restriction

MY 40 series is great sounding outside. Inside, it kills me!! When it was first isntalled it wasnt bad at all, now, 2 years later, its frickin' loud inside.

my local chevy dealer said that the 3 chamber muffler would be the only muffler that wouldn't affect my warranty, but i want a 2 chamber. is that bullshit or what?

Well I would go with the 3 then (like your gonna choose to get you warranty voided) but like jeverett said it's gonna get annoying after a while, plus your not going to be able to tell a power difference between the 2. Also you don't want it being too loud being a v-6, just give it a little depth.
The one on mine realy sucks b/c you can barely hear it but I guess that's good with a fam. and all.